macb: allow reception of large (>1518 bytes) frames

Enable BIG bit in the network configuration register, so the MAC
doesn't reject big frames (E.G. when vlans are used).
Signed-off-by: NPeter Korsgaard <peter.korsgaard@barco.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/macb.c

@@ -793,6 +793,7 @@ static void macb_init_hw(struct macb *bp)
 	config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L);
 	config |= MACB_BIT(PAE);		/* PAuse Enable */
 	config |= MACB_BIT(DRFCS);		/* Discard Rx FCS */
+	config |= MACB_BIT(BIG);		/* Receive oversized frames */
 	if (bp->dev->flags & IFF_PROMISC)
 		config |= MACB_BIT(CAF);	/* Copy All Frames */
 	if (!(bp->dev->flags & IFF_BROADCAST))