rocker: Add missing break for PRE_BRIDGE_FLAGS

A missing break keyword should have been added after adding support for
PRE_BRIDGE_FLAGS.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 93700458 ("rocker: Check Handle PORT_PRE_BRIDGE_FLAGS")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/rocker/rocker_main.c

@@ -2083,6 +2083,7 @@ static int rocker_port_attr_set(struct net_device *dev,
 		err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
 							      attr->u.brport_flags,
 							      trans);
+		break;
 	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
 		err = rocker_world_port_attr_bridge_flags_set(rocker_port,
 							      attr->u.brport_flags,