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-mx31moboard.c b/arch/arm/mach-imx/mach-mx31moboard.c
index 2290d30..6c2e058 100644
--- a/arch/arm/mach-imx/mach-mx31moboard.c
+++ b/arch/arm/mach-imx/mach-mx31moboard.c
@@ -44,12 +44,12 @@
 #include <asm/memblock.h>
 #include <mach/common.h>
 #include <mach/hardware.h>
-#include <mach/iomux-mx3.h>
 #include <mach/ulpi.h>
 #include <linux/platform_data/asoc-imx-ssi.h>
 
 #include "board-mx31moboard.h"
 #include "devices-imx31.h"
+#include "iomux-mx3.h"
 
 static unsigned int moboard_pins[] = {
 	/* UART0 */