net: Add header for usage of fls64()

BugLink: https://bugs.launchpad.net/bugs/1818815

[ Upstream commit 8681ef1f ]

Fixes: 3b89ea9c ("net: Fix for_each_netdev_feature on Big endian")
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

include/linux/netdev_features.h

@@ -11,6 +11,7 @@
 #define _LINUX_NETDEV_FEATURES_H
 
 #include <linux/types.h>
+#include <linux/bitops.h>
 #include <asm/byteorder.h>
 
 typedef u64 netdev_features_t;