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-cpuimx51sd.c b/arch/arm/mach-imx/mach-cpuimx51sd.c
index 6cb3887..3c2ceed 100644
--- a/arch/arm/mach-imx/mach-cpuimx51sd.c
+++ b/arch/arm/mach-imx/mach-cpuimx51sd.c
@@ -28,7 +28,6 @@
 
 #include <mach/common.h>
 #include <mach/hardware.h>
-#include <mach/iomux-mx51.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -38,6 +37,7 @@
 #include "devices-imx51.h"
 #include "cpu_op-mx51.h"
 #include "eukrea-baseboards.h"
+#include "iomux-mx51.h"
 
 #define USBH1_RST		IMX_GPIO_NR(2, 28)
 #define ETH_RST			IMX_GPIO_NR(2, 31)