UPSTREAM: mac80211: only remove AP VLAN frames from TXQ

When removing an AP VLAN interface, mac80211 currently purges
the entire TXQ for the AP interface. Fix this by using the FQ
API introduced in the previous patch to filter frames.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Toke Hiland-Jrgensen <toke@toke.dk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
(cherry picked from commit 2a9e2579)

Fix conflicts:
net/mac80211/ieee80211_i.h

BUG=b:131197056
TEST=Compile v4.14-gw kernel

Change-Id: If9659b4b167930295507846d449f91c8b65eada5
Signed-off-by: Kan Yan <kyan@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1703102


Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Julan Hsu <julanhsu@google.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Kan Yan <kyan@chromium.org>