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/pcm970-baseboard.c b/arch/arm/mach-imx/pcm970-baseboard.c
index 9917e2f..8e45807 100644
--- a/arch/arm/mach-imx/pcm970-baseboard.c
+++ b/arch/arm/mach-imx/pcm970-baseboard.c
@@ -24,10 +24,10 @@
 #include <asm/mach/arch.h>
 
 #include <mach/common.h>
-#include <mach/iomux-mx27.h>
 #include <mach/hardware.h>
 
 #include "devices-imx27.h"
+#include "iomux-mx27.h"
 
 static const int pcm970_pins[] __initconst = {
 	/* SDHC */