usb: dwc3: gadget: add a debugging print when initializing endpoints

that way we get debugging information when
enabling verbose debug of the driver.

It will be no-op otherwise.

Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index f5efa03..3850ff0 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1650,6 +1650,8 @@
 
 		dep->endpoint.name = dep->name;
 
+		dev_vdbg(dwc->dev, "initializing %s\n", dep->name);
+
 		if (epnum == 0 || epnum == 1) {
 			dep->endpoint.maxpacket = 512;
 			dep->endpoint.maxburst = 1;