Currently, we disallow BRDGSIFVLANSET when IFBRF_VLANFILTER is disabled.
There's no particular reason to do this, and it causes some undesirable
behaviour such as not being able to remove the tagged config on a member
after disabling vlanfilter on the bridge.
Remove the restriction so BRDGSIFVLANSET is always accepted.
PR: 292019
MFC after: 1 week