s5pc1xx: gpio: bug fix at gpio_set_pull function

When set to PULL_NONE, gpio_set_pull function is returned without write the register.
This patch fixed it.

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/drivers/gpio/s5p_gpio.c b/drivers/gpio/s5p_gpio.c
index 0439477..a1bcddc 100644
--- a/drivers/gpio/s5p_gpio.c
+++ b/drivers/gpio/s5p_gpio.c
@@ -96,7 +96,7 @@
 		value |= PULL_MODE(gpio, mode);
 		break;
 	default:
-		return;
+		break;
 	}
 
 	writel(value, &bank->pull);