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-mx31ads.c b/arch/arm/mach-imx/mach-mx31ads.c
index e774b07..ef3a01b 100644
--- a/arch/arm/mach-imx/mach-mx31ads.c
+++ b/arch/arm/mach-imx/mach-mx31ads.c
@@ -29,7 +29,6 @@
 #include <asm/memory.h>
 #include <asm/mach/map.h>
 #include <mach/common.h>
-#include <mach/iomux-mx3.h>
 
 #ifdef CONFIG_MACH_MX31ADS_WM1133_EV1
 #include <linux/mfd/wm8350/audio.h>
@@ -38,6 +37,7 @@
 #endif
 
 #include "devices-imx31.h"
+#include "iomux-mx3.h"
 
 /* Base address of PBC controller */
 #define PBC_BASE_ADDRESS	MX31_CS4_BASE_ADDR_VIRT