configs: move CONFIG_USB_EHCI_VF to Kconfig

Move CONFIG_USB_EHCI_VF to drivers/usb/host/Kconfig and update the one
and only user thereof being colibri_vf.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index ba1e6bf..0fbc115 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -154,6 +154,13 @@
 	  Enables support for the on-chip EHCI controller on OMAP3 and later
 	  SoCs.
 
+config USB_EHCI_VF
+	bool "Support for Vybrid on-chip EHCI USB controller"
+	depends on ARCH_VF610
+	default y
+	help
+	  Enables support for the on-chip EHCI controller on Vybrid SoCs.
+
 if USB_EHCI_MX7
 
 config MXC_USB_OTG_HACTIVE
diff --git a/include/configs/colibri_vf.h b/include/configs/colibri_vf.h
index 31ff8a0..2fe7f21 100644
--- a/include/configs/colibri_vf.h
+++ b/include/configs/colibri_vf.h
@@ -159,7 +159,6 @@
 #endif
 
 /* USB Host Support */
-#define CONFIG_USB_EHCI_VF
 #define CONFIG_USB_MAX_CONTROLLER_COUNT 2
 #define CONFIG_EHCI_HCD_INIT_AFTER_RESET
 
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index fa98efc..31c1ba3 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -4514,7 +4514,6 @@
 CONFIG_USB_EHCI_SPEAR
 CONFIG_USB_EHCI_TXFIFO_THRESH
 CONFIG_USB_EHCI_VCT
-CONFIG_USB_EHCI_VF
 CONFIG_USB_ETH_QMULT
 CONFIG_USB_ETH_SUBSET
 CONFIG_USB_EXT2_BOOT