usb: Convert pr_warning to pr_warn

Use the more common logging mechanism.

Miscellanea:

o Realign multiline statements
o Coalesce format

Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index e0cd1e4..62ec842 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -622,8 +622,8 @@ static void gs_write_complete(struct usb_ep *ep, struct usb_request *req)
 	switch (req->status) {
 	default:
 		/* presumably a transient fault */
-		pr_warning("%s: unexpected %s status %d\n",
-				__func__, ep->name, req->status);
+		pr_warn("%s: unexpected %s status %d\n",
+			__func__, ep->name, req->status);
 		/* FALL THROUGH */
 	case 0:
 		/* normal completion */