Merge tag 'drm-intel-fixes-2018-09-19' of git://anongit.freedesktop.org/drm/drm-intel...

Only fixes coming from gvt containing "Two more BXT fixes from Colin,
one srcu locking fix and one fix for GGTT clear when destroy vGPU."

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180919151915.GA6309@intel.com