MIPS: AR7: Implement gpiolib

This patch implements gpiolib for the AR7 SoC.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/816/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/ar7/platform.c b/arch/mips/ar7/platform.c
index f70a10a..5a3fa94 100644
--- a/arch/mips/ar7/platform.c
+++ b/arch/mips/ar7/platform.c
@@ -34,6 +34,7 @@
 #include <linux/etherdevice.h>
 #include <linux/phy.h>
 #include <linux/phy_fixed.h>
+#include <linux/gpio.h>
 
 #include <asm/addrspace.h>
 #include <asm/mach-ar7/ar7.h>