dpaa_eth: Fix comparing pointer to 0

Fixes coccicheck warning:
./drivers/net/ethernet/freescale/dpaa/dpaa_eth.c:2110:30-31:
WARNING comparing pointer to 0

Avoid pointer type value compared to 0.
Signed-off-by: NAishwarya Ramakrishnan <aishwaryarj100@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa/dpaa_eth.c

@@ -2107,7 +2107,7 @@ static int dpaa_a050385_wa(struct net_device *net_dev, struct sk_buff **s)
 
 	/* Workaround for DPAA_A050385 requires data start to be aligned */
 	start = PTR_ALIGN(new_skb->data, DPAA_A050385_ALIGN);
-	if (start - new_skb->data != 0)
+	if (start - new_skb->data)
 		skb_reserve(new_skb, start - new_skb->data);
 
 	skb_put(new_skb, skb->len);