ARM: imx: include common.h rather than mach/common.h

Rename mach-imx/include/mach/common.h to mach-imx/common.h and update
all users to include common.h rather than mach/common.h.

It also removes an unneeded inclusion to common.h in
mach-imx/devices/devices.c.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-imx/mm-imx25.c

@@ -24,10 +24,10 @@
 #include <asm/pgtable.h>
 #include <asm/mach/map.h>
 
-#include <mach/common.h>
 #include <mach/hardware.h>
 #include <mach/mx25.h>
 
+#include "common.h"
 #include "devices/devices-common.h"
 #include "iomux-v3.h"