usb: gadget: s3c-hsotg: Propagate devicetree to gadget drivers

Fill dev.of_node of gadget drivers, so they can use devicetree

Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 75a28e6..b13e0bb 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2953,6 +2953,7 @@
 	driver->driver.bus = NULL;
 	hsotg->driver = driver;
 	hsotg->gadget.dev.driver = &driver->driver;
+	hsotg->gadget.dev.of_node = hsotg->dev->of_node;
 	hsotg->gadget.dev.dma_mask = hsotg->dev->dma_mask;
 	hsotg->gadget.speed = USB_SPEED_UNKNOWN;