mac80211: Extend filter flag documentation about unsupported flags

This extends the filter flags documentation to make it clear
what clearing a flag really means.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
1 file changed