arm: mx6: usb: kconfig: add USB_EHCI_MX6 kconfig option

Add USB_EHCI_MX6 option to menuconfig and use it when migrating cm-fx6 usb
config to defconfig.

Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>

configs/cm_fx6_defconfig

@@ -15,4 +15,8 @@ CONFIG_CMD_PING=y
 CONFIG_SPI_FLASH=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_I2C=y
+CONFIG_USB=y
 CONFIG_CMD_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_MX6=y
+CONFIG_USB_STORAGE=y

drivers/usb/host/Kconfig

@@ -52,6 +52,13 @@ config USB_EHCI
 
 if USB_EHCI_HCD
 
+config USB_EHCI_MX6
+	bool "Support for i.MX6 on-chip EHCI USB controller"
+	depends on ARCH_MX6
+	default y
+	---help---
+	  Enables support for the on-chip EHCI controller on i.MX6 SoCs.
+
 config USB_EHCI_UNIPHIER
 	bool "Support for UniPhier on-chip EHCI USB controller"
 	depends on ARCH_UNIPHIER && OF_CONTROL

include/configs/cm_fx6.h

@@ -198,9 +198,6 @@
 #define CONFIG_NET_RETRY_COUNT		5
 
 /* USB */
-#define CONFIG_USB_EHCI
-#define CONFIG_USB_EHCI_MX6
-#define CONFIG_USB_STORAGE
 #define CONFIG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
 #define CONFIG_MXC_USB_FLAGS		0
 #define CONFIG_USB_MAX_CONTROLLER_COUNT	2