drm/msm/a5xx: Add support for Adreno 506 GPU

This GPU is found on SoCs such as MSM8953 (650 MHz), SDM450 (600 MHz),
SDM632 (725 MHz).

Signed-off-by: Vladimir Lypak <vladimir.lypak@gmail.com>
Link: https://lore.kernel.org/r/20211212160333.980343-1-vladimir.lypak@gmail.com


Signed-off-by: Rob Clark <robdclark@chromium.org>