dt-bindings: phy: qcom, hdmi-phy-other: mark it as clock provider

dt-bindings: phy: qcom, hdmi-phy-other: mark it as clock provider

Eventually all HDMI PHYs are going to provide the HDMI PLL clock to the
MMCC. Add #clock-cells property required to provide the HDMI PLL clock to
other devices.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/519213/
Link: https://lore.kernel.org/r/20230119132219.2479775-3-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>