dpaa2-eth: make dpaa2_eth_set_dist_key static

The dpaa2_eth_set_dist_key function is only used in a single file.
Make it static.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c

@@ -2172,7 +2172,7 @@ int dpaa2_eth_cls_fld_off(int prot, int field)
 /* Set Rx distribution (hash or flow classification) key
  * flags is a combination of RXH_ bits
  */
-int dpaa2_eth_set_dist_key(struct net_device *net_dev,
+static int dpaa2_eth_set_dist_key(struct net_device *net_dev,
 				  enum dpaa2_eth_rx_dist type, u64 flags)
 {
 	struct device *dev = net_dev->dev.parent;