net: dcb: fix small regression in __dcbnl_pg_setcfg()

A small regression was introduced in the reply command of
dcbnl_pg_setcfg(). User space apps may be expecting the
DCB_ATTR_PG_CFG attribute to be returned with the patch
below TX or RX variants are returned.

commit 7be99413
Author: Thomas Graf <tgraf@suug.ch>
Date:   Wed Jun 13 02:54:55 2012 +0000

    dcbnl: Shorten all command handling functions

This patch reverts this behavior and returns DCB_ATTR_PG_CFG
Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com>
Acked-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/dcb/dcbnl.c

@@ -852,8 +852,7 @@ static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 		}
 	}
 
-	return nla_put_u8(skb,
-			  (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG), 0);
+	return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
 }
 
 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,