[MIPS] Add generic GPIO support

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/gpio.h b/include/asm-mips/gpio.h
new file mode 100644
index 0000000..06e46fa
--- /dev/null
+++ b/include/asm-mips/gpio.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_MIPS_GPIO_H
+#define __ASM_MIPS_GPIO_H
+
+#include <gpio.h>
+
+#endif /* __ASM_MIPS_GPIO_H */