phy: rockchip: samsung-hdptx: Switch to driver specific HDMI config

phy: rockchip: samsung-hdptx: Switch to driver specific HDMI config

In preparation to support the FRL operation mode which gets configured
via the lanes and rate per lane tuple, switch to a driver specific
struct for configuring the link rate and bpc.

This simplifies and optimizes the implementation by allowing implicit
switches between TMDS and FRL rates, without requiring additional checks
of the active PHY mode followed by recalculations of the link rate when
operating in FRL mode.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20260113-phy-hdptx-frl-v6-9-8d5f97419c0b@collabora.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>