[NETFILTER]: bridge netfilter: use non-deprecated __RW_LOCK_UNLOCKED macro.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/bridge/netfilter/ebtable_nat.c b/net/bridge/netfilter/ebtable_nat.c
index bc71273..5b495fe 100644
--- a/net/bridge/netfilter/ebtable_nat.c
+++ b/net/bridge/netfilter/ebtable_nat.c
@@ -55,7 +55,7 @@
 	.name		= "nat",
 	.table		= &initial_table,
 	.valid_hooks	= NAT_VALID_HOOKS,
-	.lock		= RW_LOCK_UNLOCKED,
+	.lock		= __RW_LOCK_UNLOCKED(frame_nat.lock),
 	.check		= check,
 	.me		= THIS_MODULE,
 };