drm/msm/a6xx: Add A730 support

Add support for Adreno 730, also known as GEN7_0_x, found on SM8450.

Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> # sm8450
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/559290/


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