ARM: mach-imx: cpu-imx5: Include "common.h"

Fix the following sparse warnings:

arch/arm/mach-imx/cpu-imx5.c:65:12: warning: symbol 'mx51_neon_fixup' was not declared. Should it be static?
arch/arm/mach-imx/cpu-imx5.c:99:5: warning: symbol 'mx53_revision' was not declared. Should it be static?
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/cpu-imx5.c

@@ -18,6 +18,7 @@
 #include <linux/io.h>
 
 #include "hardware.h"
+#include "common.h"
 
 static int mx5_cpu_rev = -1;