S5P: Exynos: Config: Enable GPIO CMD config

Enabling configs for GPIO CMD, EXYNOS4 family and replacing
exynos_gpio_get with new linear GPIO pin number required
because of the new function asking only 2 arguments (pin
and value) instead of 3 (bank, pin and value).

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/include/configs/exynos5-dt.h b/include/configs/exynos5-dt.h
index 414db42..5a9b1b4 100644
--- a/include/configs/exynos5-dt.h
+++ b/include/configs/exynos5-dt.h
@@ -288,4 +288,6 @@
 
 #define CONFIG_CMD_BOOTZ
 
+#define CONFIG_CMD_GPIO
+
 #endif	/* __CONFIG_H */