mx23evk: Enable USB support

This enabled USB support for the mx23evk board.
Signed-off-by: NOtavio Salvador <otavio@ossystems.com.br>

include/configs/mx23evk.h

@@ -58,6 +58,7 @@
 #define CONFIG_CMD_FAT
 #define CONFIG_CMD_GPIO
 #define CONFIG_CMD_MMC
+#define CONFIG_CMD_USB
 #define CONFIG_CMD_BOOTZ
 
 /* Memory configurations */
@@ -122,6 +123,16 @@
 #define CONFIG_MXS_MMC
 #endif
 
+/* USB */
+#ifdef	CONFIG_CMD_USB
+#define CONFIG_USB_EHCI
+#define CONFIG_USB_EHCI_MXS
+#define CONFIG_EHCI_MXS_PORT0
+#define CONFIG_USB_MAX_CONTROLLER_COUNT 1
+#define CONFIG_EHCI_IS_TDI
+#define CONFIG_USB_STORAGE
+#endif
+
 /* Boot Linux */
 #define CONFIG_CMDLINE_TAG
 #define CONFIG_SETUP_MEMORY_TAGS