drm/panel: mantix: Support panel from Shenzhen Yashi Changhua Intelligent Technology Co

The panel uses the same driver IC and has the same resolution but a
slightly different default mode. It seems it can work with the same
init sequence.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/8855b4fc681c675182ce33e0a6cba46bab2bac43.1605688147.git.agx@sigxcpu.org