imx: mx6ul: Add pins IOMUX head file

Add i.MX6UL pins IOMUX file which defines the IOMUX settings for choose.
Signed-off-by: NPeng Fan <Peng.Fan@freescale.com>
Signed-off-by: NYe.Li <B37916@freescale.com>

arch/arm/include/asm/arch-mx6/mx6-pins.h

@@ -37,6 +37,8 @@ enum {
 #include "mx6sl_pins.h"
 #elif defined(CONFIG_MX6SX)
 #include "mx6sx_pins.h"
+#elif defined(CONFIG_MX6UL)
+#include "mx6ul_pins.h"
 #else
 #error "Please select cpu"
 #endif	/* CONFIG_MX6Q */