net: unexport netdev_fix_features()

It is not used anywhere except net/core/dev.c now.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index e57be02..9444c5c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5209,7 +5209,7 @@
 	list_del(&single);
 }
 
-u32 netdev_fix_features(struct net_device *dev, u32 features)
+static u32 netdev_fix_features(struct net_device *dev, u32 features)
 {
 	/* Fix illegal checksum combinations */
 	if ((features & NETIF_F_HW_CSUM) &&
@@ -5268,7 +5268,6 @@
 
 	return features;
 }
-EXPORT_SYMBOL(netdev_fix_features);
 
 int __netdev_update_features(struct net_device *dev)
 {