can: sun4i: fix arbitration lost error reporting

This patch fixes a bug in arbitration error reporting
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NGerhard Bertelsmann <info@gerhard-bertelsmann.de>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/sun4i_can.c

@@ -601,7 +601,7 @@ static int sun4i_can_err(struct net_device *dev, u8 isrc, u8 status)
 		stats->tx_errors++;
 		if (likely(skb)) {
 			cf->can_id |= CAN_ERR_LOSTARB;
-			cf->data[0] = (alc & 0x1f) >> 8;
+			cf->data[0] = (alc >> 8) & 0x1f;
 		}
 	}