usb/gadget: at91sam9g20 fix end point max packet size

on 9g20 they are the same as the 9260
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/at91_udc.c

@@ -1767,7 +1767,7 @@ static int __init at91udc_probe(struct platform_device *pdev)
 	}
 
 	/* newer chips have more FIFO memory than rm9200 */
-	if (cpu_is_at91sam9260()) {
+	if (cpu_is_at91sam9260() || cpu_is_at91sam9g20()) {
 		udc->ep[0].maxpacket = 64;
 		udc->ep[3].maxpacket = 64;
 		udc->ep[4].maxpacket = 512;