mx1: add missing include

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx1/generic.c b/arch/arm/mach-mx1/generic.c
index 9c3528d..7622c9b 100644
--- a/arch/arm/mach-mx1/generic.c
+++ b/arch/arm/mach-mx1/generic.c
@@ -26,6 +26,7 @@
 
 #include <asm/mach/map.h>
 
+#include <mach/common.h>
 #include <mach/hardware.h>
 
 static struct map_desc imx_io_desc[] __initdata = {