bonding: simple code refactor

Remove duplicate code.

Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index b979c26..675b082 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2900,6 +2900,8 @@
 			if (old_duplex != slave->duplex)
 				bond_3ad_adapter_duplex_changed(slave);
 		}
+		/* Fallthrough */
+	case NETDEV_DOWN:
 		/* Refresh slave-array if applicable!
 		 * If the setup does not use miimon or arpmon (mode-specific!),
 		 * then these events will not cause the slave-array to be
@@ -2911,10 +2913,6 @@
 		if (bond_mode_uses_xmit_hash(bond))
 			bond_update_slave_arr(bond, NULL);
 		break;
-	case NETDEV_DOWN:
-		if (bond_mode_uses_xmit_hash(bond))
-			bond_update_slave_arr(bond, NULL);
-		break;
 	case NETDEV_CHANGEMTU:
 		/* TODO: Should slaves be allowed to
 		 * independently alter their MTU?  For