[ARM] mxc: add missing include

include devices.h from devices.c to avoid inconsistencies and to fix
sparse warnings

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx1/devices.c b/arch/arm/mach-mx1/devices.c
index cea8f2c..97f42d9 100644
--- a/arch/arm/mach-mx1/devices.c
+++ b/arch/arm/mach-mx1/devices.c
@@ -26,6 +26,8 @@
 #include <mach/irqs.h>
 #include <mach/hardware.h>
 
+#include "devices.h"
+
 static struct resource imx_csi_resources[] = {
 	[0] = {
 		.start  = 0x00224000,