phy: rockchip: Add Samsung MIPI D-/C-PHY driver

Add driver for the MIPI D-/C-PHY block based around a Samsung IP-block
that is for example needed to drive a MIPI DSI output on rk3588.

Right now only the D-PHY portion is implemented, with the C-PHY part
needing separate work.

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>
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Link: https://lore.kernel.org/r/20250313134035.278133-3-heiko@sntech.de


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