ieee802154: Remove redundant initialization of variable ret

The variable ret is being initialized with a value that is never read, it
is being updated later on. The assignment is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index 1cf5ac0..323d3d2 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -617,7 +617,7 @@
 {
 	struct net_device *ndev = NULL;
 	struct ieee802154_sub_if_data *sdata = NULL;
-	int ret = -ENOMEM;
+	int ret;
 
 	ASSERT_RTNL();