usb: Fastboot function config for better consistency with other functions

USB download gadget functions such as thor and dfu have a separate config option
for the USB gadget part of the code, independent from the command part.
This switches the fastboot USB gadget to the same scheme, for better
consistency.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>

Test HW: Odroid_XU3 (Exynos5422), trats (Exynos4210)
diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index 7fd8cf7..abcdfda 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -298,6 +298,7 @@
 
 #ifndef CONFIG_SPL_USBETH_SUPPORT
 /* Fastboot */
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
diff --git a/include/configs/bav335x.h b/include/configs/bav335x.h
index b53c49e..31b75f2 100644
--- a/include/configs/bav335x.h
+++ b/include/configs/bav335x.h
@@ -455,6 +455,7 @@
 
 #ifndef CONFIG_SPL_USBETH_SUPPORT
 /* Fastboot */
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
diff --git a/include/configs/dra7xx_evm.h b/include/configs/dra7xx_evm.h
index b969944..62330bf 100644
--- a/include/configs/dra7xx_evm.h
+++ b/include/configs/dra7xx_evm.h
@@ -89,6 +89,7 @@
 	DFU_ALT_INFO_RAM
 
 /* Fastboot */
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR    CONFIG_SYS_LOAD_ADDR
diff --git a/include/configs/nitrogen6x.h b/include/configs/nitrogen6x.h
index 231da72..47239b1 100644
--- a/include/configs/nitrogen6x.h
+++ b/include/configs/nitrogen6x.h
@@ -346,6 +346,7 @@
 #define CONFIG_G_DNL_PRODUCT_NUM 0xa4a5
 #define CONFIG_G_DNL_MANUFACTURER "Boundary"
 
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR   CONFIG_SYS_LOAD_ADDR
diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
index 8ebb5bd..59c780e 100644
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -72,6 +72,7 @@
 #define CONFIG_G_DNL_VENDOR_NUM		0x0451
 #define CONFIG_G_DNL_PRODUCT_NUM	0xd022
 #define CONFIG_G_DNL_MANUFACTURER	"TI"
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR