dm: exynos: Make sure that GPIOs are requested

With driver model GPIOs must be requested before use. Make sure this is
done correctly.

(Note that the soft SPI part of universal is omitted, since this driver
is about to be replaced with a driver-model-aware version)

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/samsung/arndale/arndale.c b/board/samsung/arndale/arndale.c
index e39795d..881d080 100644
--- a/board/samsung/arndale/arndale.c
+++ b/board/samsung/arndale/arndale.c
@@ -19,6 +19,8 @@
 	/* Configure gpios for usb 3503 hub:
 	 * disconnect, toggle reset and connect
 	 */
+	gpio_request(EXYNOS5_GPIO_D17, "usb_connect");
+	gpio_request(EXYNOS5_GPIO_X35, "usb_reset");
 	gpio_direction_output(EXYNOS5_GPIO_D17, 0);
 	gpio_direction_output(EXYNOS5_GPIO_X35, 0);