D5380: [platforms/drm] Explicitly request event context version 2

[Roman Gilg]

subdiff accepted this revision.

REPOSITORY
  R108 KWin

BRANCH
  drm-event-version-plasma-5.8

REVISION DETAIL
  https://phabricator.kde.org/D5380

To: graesslin, #kwin, #plasma, fooishbar, subdiff
Cc: plasma-devel, kwin, progwolff, lesliezhai, ali-mohamed, hardening, 
jensreuterberg, abetts, sebas, apol