drm/rockchip: stop passing non struct drm_device to drm_err() and friends

drm/rockchip: stop passing non struct drm_device to drm_err() and friends

The expectation is that the struct drm_device based logging helpers get
passed an actual struct drm_device pointer rather than some random
struct pointer where you can dereference the ->dev member.

Convert drm_err(hdmi, ...) to dev_err(hdmi->dev, ...). This matches
current usage, but drops "[drm] *ERROR*" prefix from logging.

Reviewed-by: Simona Vetter <simona.vetter@ffwll.ch>
Reviewed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f42da4c9943a2f2a9de4272b7849e72236d4c3f9.1737644530.git.jani.nikula@intel.com