GPIO: Tegra2: add GPIO driver for Tegra2

Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index a5fa2b5..1e3ae11 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -31,6 +31,7 @@
 COBJS-$(CONFIG_MXC_GPIO)	+= mxc_gpio.o
 COBJS-$(CONFIG_PCA953X)		+= pca953x.o
 COBJS-$(CONFIG_S5P)		+= s5p_gpio.o
+COBJS-$(CONFIG_TEGRA2_GPIO)	+= tegra2_gpio.o
 
 COBJS	:= $(COBJS-y)
 SRCS 	:= $(COBJS:.o=.c)