usb: gadget: at91_udc: fix dt support

commit 9c6d196d5aa35e07482f23c3e37755e7a82140e0 upstream.

Don't fail the initialization check for the platform_data
if there is avaiable an associated device tree node.

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 9d7bcd9..be6952e 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1735,7 +1735,7 @@
 	int		retval;
 	struct resource	*res;
 
-	if (!dev->platform_data) {
+	if (!dev->platform_data && !pdev->dev.of_node) {
 		/* small (so we copy it) but critical! */
 		DBG("missing platform_data\n");
 		return -ENODEV;