qede: mark qede_set_features() static

We get 1 warning when building kernel with W=1:
drivers/net/ethernet/qlogic/qede/qede_main.c:2113:5: warning: no previous prototype for 'qede_set_features' [-Wmissing-prototypes]

In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
so this patch marks this function with 'static'.
Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qede/qede_main.c

@@ -2116,7 +2116,7 @@ static void qede_vlan_mark_nonconfigured(struct qede_dev *edev)
 	edev->accept_any_vlan = false;
 }
 
-int qede_set_features(struct net_device *dev, netdev_features_t features)
+static int qede_set_features(struct net_device *dev, netdev_features_t features)
 {
 	struct qede_dev *edev = netdev_priv(dev);
 	netdev_features_t changes = features ^ dev->features;