nl80211: Pass "global" events to all interfaces

nl80211: Pass "global" events to all interfaces

We got connection failures because of outdated channel information.
That's because the NL80211_CMD_REG_CHANGE event is important for all
interfaces.

Commit f13683720239 ("nl80211: Pass wiphy events to all affected
interfaces") skips the early termination for events directed to a wiphy,
but that doesn't cover the regulatory change event because it doesn't
have a wiphy set either. Therefore the early termination still kicks in
and from three interfaces, only one got the updated channel list.

Fix this by changing the early termination logic to only apply to events
directed either to a specific interface index for wdev.

Signed-off-by: Dominik Cermak <dominik.cermak@joynext.com>