openvswitch: Simplify interface ovs_flow_metadata_from_nlattrs()

This is not functional change, this is just code cleanup.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 748aa97..0f783d9 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -739,10 +739,7 @@
 	if (err)
 		goto err_flow_free;
 
-	err = ovs_flow_metadata_from_nlattrs(&flow->key.phy.priority,
-					     &flow->key.phy.skb_mark,
-					     &flow->key.phy.in_port,
-					     a[OVS_PACKET_ATTR_KEY]);
+	err = ovs_flow_metadata_from_nlattrs(flow, a[OVS_PACKET_ATTR_KEY]);
 	if (err)
 		goto err_flow_free;