dt-bindings: soc: rockchip: Add rk3588 hdptxphy syscon

Add compatible for the hdptxphy GRF used by rk3588-hdptx-phy.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240119193806.1030214-2-cristian.ciocaltea@collabora.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>