usb: gadget: udc: dummy: remove unnecessary & operation

Now that usb_endpoint_maxp() only returns the lowest
11 bits from wMaxPacketSize, we can remove the &
operation from this driver.

Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: <linux-usb@vger.kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/gadget/udc/dummy_hcd.c

@@ -503,7 +503,7 @@ static int dummy_enable(struct usb_ep *_ep,
 	 * maximum packet size.
 	 * For SS devices the wMaxPacketSize is limited by 1024.
 	 */
-	max = usb_endpoint_maxp(desc) & 0x7ff;
+	max = usb_endpoint_maxp(desc);
 
 	/* drivers must not request bad settings, since lower levels
 	 * (hardware or its drivers) may not check.  some endpoints