mac80211: Update to version 4.19.7-1

mac80211: Update to version 4.19.7-1

This updates the backports package used in mac80211 to version 4.19.7-1
which is based on kernel 4.19.7. This integrates all the stable fixes
introduces in this kernel version.

The deleted patches are not needed any more because they are either
included in the upstream Linux kernel 4.19.7 or in backports 4.19.7-1.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(backported from ac5a6acbb1aa16746644447b6a2630a3a8b20073)
(rebased patches)
Signed-off-by: Jo-Philipp Wich <jo@mein.io>