drm/tilcdc: Remove tilcdc_panel driver reintroduced by a merge

drm/tilcdc: Remove tilcdc_panel driver reintroduced by a merge

The tilcdc_panel driver was removed by commit 8f1e1ab9c794 ("drm/tilcdc:
Remove tilcdc panel driver"), but was inadvertently reintroduced by the
merge commit 8b85987d3cf5 ("Merge drm/drm-next into drm-misc-next").

The regression went unnoticed because standard git commands such as
'git show' do not expose the change. It was only spotted via
'git show --stat':

  git show --stat 8b85987d3cf5 | grep tilcdc
  drivers/gpu/drm/tilcdc/tilcdc_panel.c | 408 +

  git show 8b85987d3cf5 | grep tilcdc
  (no output)

Remove tilcdc_panel.c again to restore the previously intended state.

Fixes: 8b85987d3cf5 ("Merge drm/drm-next into drm-misc-next")
Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://patch.msgid.link/20260305155921.659550-1-kory.maincent@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>