drm/amdgpu/display: add quirk handling for stutter mode

drm/amdgpu/display: add quirk handling for stutter mode

[ Upstream commit 67377c05dd365f71da59bc2e32328949969bbee7 ]

Stutter mode is a power saving feature on GPUs, however at
least one early raven system exhibits stability issues with
it.  Add a quirk to disable it for that system.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214417
Fixes: 591bb0d8264b33 ("drm/amdgpu: enable gfxoff again on raven series (v2)")
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>