dt-bindings: clock: qcom: gcc-qcs404: add two GDSC entries

On QCS404 platform the Global Clock Controller supports two GDSCs: MDSS
(display) and OXILI (GPU). Add corresponding indices.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221226042154.2666748-2-dmitry.baryshkov@linaro.org