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/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
index d20d479..08a143a 100644
--- a/arch/arm/mach-imx/clk-imx25.c
+++ b/arch/arm/mach-imx/clk-imx25.c
@@ -25,9 +25,10 @@
 #include <linux/err.h>
 
 #include <mach/hardware.h>
-#include <mach/common.h>
 #include <mach/mx25.h>
+
 #include "clk.h"
+#include "common.h"
 
 #define CRM_BASE	MX25_IO_ADDRESS(MX25_CRM_BASE_ADDR)