drm/amdgpu: add raven1 gfxoff quirk
[ Upstream commit 0126c0ae ] Fix screen corruption with openkylin. Link: https://bbs.openkylin.top/t/topic/171497 Signed-off-by:Peng Liu <liupeng01@kylinos.cn> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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