dt-bindings: display/msm/gmu: add Adreno 660 support

dt-bindings: display/msm/gmu: add Adreno 660 support

Add Adreno A660 to the A635 clause to define all version-specific
properties. There is no need to add it to the top-level clause, since
top-level compatible uses pattern to define compatible strings.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/521835/
Link: https://lore.kernel.org/r/20230209133839.762631-2-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>