usb: kbd: Set a default polling mechanism for USB keyboard

The choice of "USB keyboard polling" cannot be optional as without
one mechanism being set, it just doesn't work. Set the default one
to CONFIG_SYS_USB_EVENT_POLL.

Fixes: ecad7051 ("configs: Migrate all of the existing USB symbols, except fastboot")
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/Cyrus_P5020_defconfig b/configs/Cyrus_P5020_defconfig
index 82da854..37f78a4 100644
--- a/configs/Cyrus_P5020_defconfig
+++ b/configs/Cyrus_P5020_defconfig
@@ -34,5 +34,4 @@
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/Cyrus_P5040_defconfig b/configs/Cyrus_P5040_defconfig
index 0fc9a07..d33b514 100644
--- a/configs/Cyrus_P5040_defconfig
+++ b/configs/Cyrus_P5040_defconfig
@@ -34,5 +34,4 @@
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/MPC8610HPCD_defconfig b/configs/MPC8610HPCD_defconfig
index fde837c..c71d5b1 100644
--- a/configs/MPC8610HPCD_defconfig
+++ b/configs/MPC8610HPCD_defconfig
@@ -22,5 +22,4 @@
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/MPC8641HPCN_36BIT_defconfig b/configs/MPC8641HPCN_36BIT_defconfig
index 7318e72..9949e8b 100644
--- a/configs/MPC8641HPCN_36BIT_defconfig
+++ b/configs/MPC8641HPCN_36BIT_defconfig
@@ -21,5 +21,4 @@
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/MPC8641HPCN_defconfig b/configs/MPC8641HPCN_defconfig
index def36e4..c8440d2 100644
--- a/configs/MPC8641HPCN_defconfig
+++ b/configs/MPC8641HPCN_defconfig
@@ -21,5 +21,4 @@
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/apalis_imx6_defconfig b/configs/apalis_imx6_defconfig
index b2284ac..13f2a3b 100644
--- a/configs/apalis_imx6_defconfig
+++ b/configs/apalis_imx6_defconfig
@@ -54,7 +54,6 @@
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/apalis_imx6_nospl_com_defconfig b/configs/apalis_imx6_nospl_com_defconfig
index 239605d..7165749 100644
--- a/configs/apalis_imx6_nospl_com_defconfig
+++ b/configs/apalis_imx6_nospl_com_defconfig
@@ -43,7 +43,6 @@
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/apalis_imx6_nospl_it_defconfig b/configs/apalis_imx6_nospl_it_defconfig
index 1bc05d7..0ad7674 100644
--- a/configs/apalis_imx6_nospl_it_defconfig
+++ b/configs/apalis_imx6_nospl_it_defconfig
@@ -43,7 +43,6 @@
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/colibri_imx6_defconfig b/configs/colibri_imx6_defconfig
index 7d1e709..7e10086 100644
--- a/configs/colibri_imx6_defconfig
+++ b/configs/colibri_imx6_defconfig
@@ -52,7 +52,6 @@
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/colibri_imx6_nospl_defconfig b/configs/colibri_imx6_nospl_defconfig
index 6877993..ba4b2dd 100644
--- a/configs/colibri_imx6_nospl_defconfig
+++ b/configs/colibri_imx6_nospl_defconfig
@@ -41,7 +41,6 @@
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/firefly-rk3288_defconfig b/configs/firefly-rk3288_defconfig
index 82da601..178c879 100644
--- a/configs/firefly-rk3288_defconfig
+++ b/configs/firefly-rk3288_defconfig
@@ -73,7 +73,6 @@
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DWC2_OTG=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/mx6cuboxi_defconfig b/configs/mx6cuboxi_defconfig
index 5490e35..27171fb 100644
--- a/configs/mx6cuboxi_defconfig
+++ b/configs/mx6cuboxi_defconfig
@@ -34,6 +34,5 @@
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 # CONFIG_VIDEO_SW_CURSOR is not set
 CONFIG_OF_LIBFDT=y
diff --git a/configs/rpi_2_defconfig b/configs/rpi_2_defconfig
index 2345697..0370597 100644
--- a/configs/rpi_2_defconfig
+++ b/configs/rpi_2_defconfig
@@ -26,7 +26,6 @@
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/rpi_3_32b_defconfig b/configs/rpi_3_32b_defconfig
index bb56a9e..31d67cc 100644
--- a/configs/rpi_3_32b_defconfig
+++ b/configs/rpi_3_32b_defconfig
@@ -28,7 +28,6 @@
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/rpi_3_defconfig b/configs/rpi_3_defconfig
index 6edacd6..1ac3a96 100644
--- a/configs/rpi_3_defconfig
+++ b/configs/rpi_3_defconfig
@@ -28,7 +28,6 @@
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/rpi_defconfig b/configs/rpi_defconfig
index 2e81966..87e8822 100644
--- a/configs/rpi_defconfig
+++ b/configs/rpi_defconfig
@@ -26,7 +26,6 @@
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 310b8ac..632e0aa 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -175,7 +175,6 @@
 CONFIG_USB_EMUL=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
 CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index 50ea35e..b1a3415 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -160,7 +160,6 @@
 CONFIG_USB_EMUL=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
 CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
diff --git a/configs/sandbox_noblk_defconfig b/configs/sandbox_noblk_defconfig
index 693c14b..3910174 100644
--- a/configs/sandbox_noblk_defconfig
+++ b/configs/sandbox_noblk_defconfig
@@ -168,7 +168,6 @@
 CONFIG_USB_EMUL=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
 CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index db91294..7f03c6e 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -178,7 +178,6 @@
 CONFIG_USB_EMUL=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
 CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
diff --git a/configs/seaboard_defconfig b/configs/seaboard_defconfig
index ea4546b..810cfaa 100644
--- a/configs/seaboard_defconfig
+++ b/configs/seaboard_defconfig
@@ -36,7 +36,6 @@
 CONFIG_USB_ULPI=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/ventana_defconfig b/configs/ventana_defconfig
index 42353f0..b11dab1 100644
--- a/configs/ventana_defconfig
+++ b/configs/ventana_defconfig
@@ -34,7 +34,6 @@
 CONFIG_USB_ULPI=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y
 CONFIG_DM_VIDEO=y
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 62126aa..e7658b4 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -75,7 +75,7 @@
 
 choice
 	prompt "USB keyboard polling"
-	optional
+	default SYS_USB_EVENT_POLL
 	---help---
 	  Enable a polling mechanism for USB keyboard.