rtnetlink: Do not generate notifications for PRECHANGEUPPER event

PRECHANGEUPPER is an internal event; do not generate userspace
notifications.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/rtnetlink.c

@@ -4124,7 +4124,6 @@ static int rtnetlink_event(struct notifier_block *this, unsigned long event, voi
 	case NETDEV_CHANGEUPPER:
 	case NETDEV_RESEND_IGMP:
 	case NETDEV_CHANGEINFODATA:
-	case NETDEV_PRECHANGEUPPER:
 	case NETDEV_CHANGELOWERSTATE:
 	case NETDEV_CHANGE_TX_QUEUE_LEN:
 		rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);