drm/rockchip: dw_hdmi_qp: Add high color depth support

drm/rockchip: dw_hdmi_qp: Add high color depth support

Since both RK3576 and RK3588 SoCs are capable of handling 10 bpc color
depth, introduce a pair of new helpers to program the necessary
registers, as well as passing bpc at PHY configuration level.

Note max_bpc is unconditionally set to 10 before initializing the QP
bridge library, as there is no need to adjust it dynamically, i.e. per
SoC variant, for now.

While setting up .enc_init() callbacks of rockchip_hdmi_qp_ctrl_ops,
also replace the unnecessary whitespace chars before .irq_callback()
assignments.

Acked-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20251021-rk3588-10bpc-v3-5-3d3eed00a6db@collabora.com