dt-bindings: display: panel: Add Raydium RM67200

The Rockchip W552793DBA-V10 display/touchscreen board contains a
Wanchanglong W552793BAA panel, which in turn is using a Raydium
RM67200 MIPI-DSI controller. Add a DT binding for the DSI panel.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20250225-raydium-rm67200-v3-1-d9e1010dd8ab@kernel.org


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250225-raydium-rm67200-v3-1-d9e1010dd8ab@kernel.org