net: rtnl_configure_link: fix dev flags changes arg to __dev_notify_flags

net: rtnl_configure_link: fix dev flags changes arg to __dev_notify_flags

This fix addresses https://bugzilla.kernel.org/show_bug.cgi?id=201071

Commit d5988c6d9a74 wrongly relied on __dev_change_flags to notify users of
dev flag changes in the case when dev->rtnl_link_state = RTNL_LINK_INITIALIZED.
Fix it by indicating flag changes explicitly to __dev_notify_flags.

Fixes: d5988c6d9a74 ("rtnetlink: add rtnl_link_state check in rtnl_configure_link")
Reported-By: Liam mcbirnie <liam.mcbirnie@boeing.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>