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>
diff --git a/arch/arm/mach-imx/imx31-dt.c b/arch/arm/mach-imx/imx31-dt.c
index a68ba20..408afcc 100644
--- a/arch/arm/mach-imx/imx31-dt.c
+++ b/arch/arm/mach-imx/imx31-dt.c
@@ -14,9 +14,10 @@
 #include <linux/of_platform.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
-#include <mach/common.h>
 #include <mach/mx31.h>
 
+#include "common.h"
+
 static const struct of_dev_auxdata imx31_auxdata_lookup[] __initconst = {
 	OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART1_BASE_ADDR,
 			"imx21-uart.0", NULL),