SMDKV310: Fix build error for smdkv310 board

Fix build error for smdkv310 board:

board/samsung/smdkv310/smdkv310.c:126: undefined reference to `gpio_set_pull'
Signed-off-by: NChander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: NMinkyu Kang <mk7.kang@samsung.com>

board/samsung/smdkv310/smdkv310.c

@@ -123,7 +123,7 @@ int board_mmc_init(bd_t *bis)
 
 		/* GPK2[0:1] pull disable */
 		if (i == 0 || i == 1) {
-			gpio_set_pull(&gpio2->k2, i, GPIO_PULL_NONE);
+			s5p_gpio_set_pull(&gpio2->k2, i, GPIO_PULL_NONE);
 			continue;
 		}