drm/msm/a6xx: Skip dumping SCRATCH registers

drm/msm/a6xx: Skip dumping SCRATCH registers

Crashdec doesn't require SCRATCH registers anymore for a6xx and newer
architectures. So skip dumping them during recovery.

Suggested-by: Rob Clark <rob.clark@oss.qualcomm.com>
Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/689000/
Message-ID: <20251118-kaana-gpu-support-v4-4-86eeb8e93fb6@oss.qualcomm.com>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>