CHROMIUM: drm/i915/guc: Enable PAVP GuC autoteardown flow

This feature flag enables GuC autoteardown which allows for a grace
period before session teardown.
backported from: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2960319

BUG=b:339763165
TEST=Connect external monitor during playback requiring HDCP
UPSTREAM-TASK=b:364459970

Change-Id: Ica265c8e1c147e6f7f86f6050150639379f97b5d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5831989


Reviewed-by: Drew Davenport <ddavenport@chromium.org>
Tested-by: Kamal Ap <kamal.ap@intel.com>
Commit-Queue: Kamal Ap <kamal.ap@intel.corp-partner.google.com>
Signed-off-by: Mateusz Urbańczyk <urbanczyk@google.com>