drm/rockchip: dw_hdmi_qp: Add basic RK3576 HDMI output support

The HDMI on RK3576 shares the same IP block (PHY and Controller)
with rk3588.
However, there are some control bits scattered in different GRF.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Tested-by: Detlev Casanova <detlev.casanova@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20241231094425.253398-4-andyshrk@163.com