usb: musb: print an error message when high bandwidth is unsupported

There are multiple places in usb core or controller driver which returns
-EMSGSIZE when a class driver queueing urb failed, so the "Message too
long" log doesn't help much for understanding the error.

Let the musb driver to specifically print a error message when
musb_urb_enqueue() returns -EMSGSIZE.
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/musb/musb_host.c

@@ -2248,6 +2248,10 @@ static int musb_urb_enqueue(
 			ok = (usb_pipein(urb->pipe) && musb->hb_iso_rx)
 				|| (usb_pipeout(urb->pipe) && musb->hb_iso_tx);
 		if (!ok) {
+			dev_err(musb->controller,
+				"high bandwidth %s (%dx%d) not supported\n",
+				musb_ep_xfertype_string(qh->type),
+				qh->hb_mult, qh->maxpacket & 0x7ff);
 			ret = -EMSGSIZE;
 			goto done;
 		}