drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_get_tmds_output()

Another function to pass drm_device * down to so we can start using the
drm_dbg_*() in the DRM DP helpers.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210423184309.207645-12-lyude@redhat.com


Reviewed-by: Dave Airlie <airlied@redhat.com>