drm/rockchip: dw_hdmi_qp: Fix io init for dw_hdmi_qp_rockchip_resume

Use cfg->ctrl_ops->io_init callback make it work for all platform.
And it's also gets rid of code duplication

Fixes: 3f60dbd4 ("drm/rockchip: dw_hdmi_qp: Add platform ctrl callback")
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20250317102757.565679-1-andyshrk@163.com