dt-bindings: display: mantix: Add compatible for panel from YS

This panel from Shenzhen Yashi Changhua Intelligent Technology Co
uses the same driver IC but a different LCD.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/eb2a0e50cbb8cfebc27d259607e543fedb8c6b27.1605688147.git.agx@sigxcpu.org