ARM: exynos5420: removed undefined gpio structure

It's removed the exynos5_gpio_part1.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/board/samsung/smdk5420/smdk5420.c b/board/samsung/smdk5420/smdk5420.c
index 9207522..183c522 100644
--- a/board/samsung/smdk5420/smdk5420.c
+++ b/board/samsung/smdk5420/smdk5420.c
@@ -42,9 +42,6 @@
 #ifdef CONFIG_LCD
 void cfg_lcd_gpio(void)
 {
-	struct exynos5_gpio_part1 *gpio1 =
-		(struct exynos5_gpio_part1 *)samsung_get_base_gpio_part1();
-
 	/* For Backlight */
 	gpio_cfg_pin(EXYNOS5420_GPIO_B20, S5P_GPIO_OUTPUT);
 	gpio_set_value(EXYNOS5420_GPIO_B20, 1);