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/mach-mx51_babbage.c b/arch/arm/mach-imx/mach-mx51_babbage.c
index 20e6b9e..383948a 100644
--- a/arch/arm/mach-imx/mach-mx51_babbage.c
+++ b/arch/arm/mach-imx/mach-mx51_babbage.c
@@ -20,7 +20,6 @@
 #include <linux/spi/flash.h>
 #include <linux/spi/spi.h>
 
-#include <mach/common.h>
 #include <mach/hardware.h>
 
 #include <asm/setup.h>
@@ -28,6 +27,7 @@
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
 
+#include "common.h"
 #include "devices-imx51.h"
 #include "cpu_op-mx51.h"
 #include "iomux-mx51.h"