ARM: dts: am335x-evm: Use drm simple-panel instead of tilcdc-panel

Move to use the new drm panel support in tilcdc together with added
"tfc,s9700rtwv43tr-01b"-panel support in drm panel-simple.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>