Convert CONFIG_USB_EHCI_MXS to Kconfig

This option is only used for
  mx23evk_defconfig
  mx23_olinuxino_defconfig
which are the only i.MX23 boards.

Add depend on ARCH_MX23 and default to y.

Signed-off-by: Marek Behún <marek.behun@nic.cz>

drivers/usb/host/Kconfig

@@ -175,6 +175,13 @@ config USB_EHCI_MX7
 	---help---
 	  Enables support for the on-chip EHCI controller on i.MX7 SoCs.
 
+config USB_EHCI_MXS
+	bool "Support for i.MX23 EHCI USB controller"
+	depends on ARCH_MX23
+	default y
+	help
+	  Enables support for the on-chip EHCI controller on i.MX23 SoCs.
+
 config USB_EHCI_OMAP
 	bool "Support for OMAP3+ on-chip EHCI USB controller"
 	depends on ARCH_OMAP2PLUS

include/configs/mxs.h

@@ -123,7 +123,6 @@
 
 /* USB */
 #ifdef CONFIG_CMD_USB
-#define CONFIG_USB_EHCI_MXS
 #define CONFIG_USB_EHCI_IS_TDI
 #endif
 

scripts/config_whitelist.txt

@@ -3015,7 +3015,6 @@ CONFIG_USB_EHCI_EXYNOS
 CONFIG_USB_EHCI_FARADAY
 CONFIG_USB_EHCI_IS_TDI
 CONFIG_USB_EHCI_KIRKWOOD
-CONFIG_USB_EHCI_MXS
 CONFIG_USB_EHCI_TXFIFO_THRESH
 CONFIG_USB_ETH_QMULT
 CONFIG_USB_ETH_SUBSET