usb/gadget: Fix "high bandwidth" check in usb_gadget_ep_match_desc()

The current code tries to test for bits that are masked out by
usb_endpoint_maxp(). Instead, use the proper accessor to access
the new high bandwidth bits.

Signed-off-by: Benjamin Herrenschmidt <[e-mail]>
Cc: stable <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/gadget/udc/core.c

···
 		return 0;
 
 	/* "high bandwidth" works only at high speed */
-	if (!gadget_is_dualspeed(gadget) && usb_endpoint_maxp(desc) & (3<<11))
+	if (!gadget_is_dualspeed(gadget) && usb_endpoint_maxp_mult(desc) > 1)
 		return 0;
 
 	switch (type) {