dt-bindings: display: simple: Add BOE EV121WXM-N10-1850 panel

dt-bindings: display: simple: Add BOE EV121WXM-N10-1850 panel

Add BOE EV121WXM-N10-1850 12.1" WXGA (1280x800) TFT LCD panel
compatible string.  The panel has a LVDS display interface.

The panel's product specification can be found at:
http://www.onetech.com.tw/files/EV121WXM-N10-1850ProductSpecification_20180801.pdf

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230508083826.1016206-2-victor.liu@nxp.com