mmc: s5p: set SD detection pin as input

The SD Card slot detection pin should be configured as input.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c
index 0dea45d..a5d3487 100644
--- a/drivers/mmc/s5p_sdhci.c
+++ b/drivers/mmc/s5p_sdhci.c
@@ -123,7 +123,7 @@
 	if (fdt_gpio_isvalid(&host->cd_gpio)) {
 		sprintf(str, "sdhci%d_cd", host->index & 0xf);
 		gpio_request(host->cd_gpio.gpio, str);
-		gpio_direction_output(host->cd_gpio.gpio, 1);
+		gpio_direction_input(host->cd_gpio.gpio);
 		if (gpio_get_value(host->cd_gpio.gpio))
 			return -ENODEV;