ARM: S5PC1xx: add gpiolib and external/gpio interrupt support

Add support for gpiolib calls. This is based on the gpiolib implementation
from plat-s3c64xx tree.
Add support for external interrupts for GPIO H banks.
Add support for GPIO interrupts for all banks.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s5pc1xx/cpu.c b/arch/arm/plat-s5pc1xx/cpu.c
index e8f3472..02baeaa 100644
--- a/arch/arm/plat-s5pc1xx/cpu.c
+++ b/arch/arm/plat-s5pc1xx/cpu.c
@@ -60,6 +60,11 @@
 		.length		= SZ_4K,
 		.type		= MT_DEVICE,
 	}, {
+		.virtual	= (unsigned long)S5PC1XX_VA_GPIO,
+		.pfn		= __phys_to_pfn(S5PC100_PA_GPIO),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	}, {
 		.virtual	= (unsigned long)S5PC1XX_VA_CHIPID,
 		.pfn		= __phys_to_pfn(S5PC1XX_PA_CHIPID),
 		.length		= SZ_16,