dt-bindings: phy: add qcom,hdmi-phy-8998

HDMI PHY block embedded in the APQ8098.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Marc Gonzalez <mgonzalez@freebox.fr>
Patchwork: https://patchwork.freedesktop.org/patch/605634/
Link: https://lore.kernel.org/r/20240724-hdmi-tx-v7-1-e44a20553464@freebox.fr


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>