dt-bindings: phy: Add Rockchip MIPI C-/D-PHY schema

Add dt-binding schema for the MIPI C-/D-PHY found on
Rockchip RK3588 SoCs.

Tested-by: Daniel Semkowicz <dse@thaumatec.com>
Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Tested-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Link: https://lore.kernel.org/r/20250313134035.278133-2-heiko@sntech.de


Signed-off-by: Vinod Koul <vkoul@kernel.org>