gmac add IFF_BROADCAST flag to support broadcast.

Change-Id: Id3ace069c444aa220ef33428327e3fd05b446a33
Signed-off-by: QiaoChong <qiaochong@loongson.cn>

sys/dev/gmac/synopGMAC_network_interface.c

@@ -1151,7 +1151,7 @@ int synopGMAC_intr_handler(struct synopGMACNetworkAdapter * tp)
 	ifp = &(adapter->PInetdev->arpcom.ac_if);
 
 	if(gmacdev->LinkState)
-	ifp->if_flags = ifp->if_flags | IFF_RUNNING;
+	ifp->if_flags = ifp->if_flags | IFF_RUNNING | IFF_BROADCAST | IFF_SIMPLEX;
 
 
 	/*Read the Dma interrupt status to know whether the interrupt got generated by our device or not*/
@@ -2820,7 +2820,7 @@ s32  synopGMAC_init_network_interface(char* xname, struct device *sc )
 	TR("\nNow Registering the netdevice\n");
 	if_attach(ifp);
 	ether_ifattach(ifp);
-	ifp->if_flags = ifp->if_flags | IFF_RUNNING;
+	ifp->if_flags = ifp->if_flags | IFF_RUNNING | IFF_BROADCAST | IFF_SIMPLEX;
 
 #if SYNOP_TOP_DEBUG
 	dumpreg(regbase);