ARM: dts: qcom: apq8064: add #clock-cells to the HDMI PHY node

Add #clock-cells property to the HDMI PHY device node to let other nodes
resolve the hdmipll clock.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230119132219.2479775-6-dmitry.baryshkov@linaro.org