dt-bindings: display: tilcdc: Mark panel binding as deprecated

dt-bindings: display: tilcdc: Mark panel binding as deprecated

Mark the ti,tilcdc,panel binding as deprecated in the documentation.
This legacy binding should no longer be used for new designs. Users
should migrate to the standard DRM panel bindings instead.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Kory Maincent (TI.com) <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20260123-feature_tilcdc-v5-2-5a44d2aa3f6f@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>