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: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/board/samsung/smdkv310/smdkv310.c b/board/samsung/smdkv310/smdkv310.c
index 173520e..e0b89dd 100644
--- a/board/samsung/smdkv310/smdkv310.c
+++ b/board/samsung/smdkv310/smdkv310.c
@@ -123,7 +123,7 @@
 
 		/* 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;
 		}