ARM: imx: move iomux drivers and headers into mach-imx

The board files in mach-imx are the only users of iomux drivers and
headers.  Move them into mach-imx from plat-mxc.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-imx/mach-mx50_rdp.c b/arch/arm/mach-imx/mach-mx50_rdp.c
index 42b66e8..4762a3f 100644
--- a/arch/arm/mach-imx/mach-mx50_rdp.c
+++ b/arch/arm/mach-imx/mach-mx50_rdp.c
@@ -26,7 +26,6 @@
 
 #include <mach/common.h>
 #include <mach/hardware.h>
-#include <mach/iomux-mx50.h>
 
 #include <asm/irq.h>
 #include <asm/setup.h>
@@ -35,6 +34,7 @@
 #include <asm/mach/time.h>
 
 #include "devices-imx50.h"
+#include "iomux-mx50.h"
 
 #define FEC_EN		IMX_GPIO_NR(6, 23)
 #define FEC_RESET_B	IMX_GPIO_NR(4, 12)