ARM : Add GPIO Driver and IOMUX definition for S3C2440

It's now possible to use the gpio driver interface
for s3c2440. This patch add iomux definitions too.

Signed-off-by: Gabriel Huau <contact@huau-gabriel.fr>
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 17f4b73..d50ac3b 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -44,6 +44,7 @@
 COBJS-$(CONFIG_OMAP_GPIO)	+= omap_gpio.o
 COBJS-$(CONFIG_DB8500_GPIO)	+= db8500_gpio.o
 COBJS-$(CONFIG_BCM2835_GPIO)	+= bcm2835_gpio.o
+COBJS-$(CONFIG_S3C2440_GPIO)	+= s3c2440_gpio.o
 
 COBJS	:= $(COBJS-y)
 SRCS 	:= $(COBJS:.o=.c)