drm/panel: jd9365da: Break some CMDS into helper functions

These panels have some common cmds (e0h~e3h,80h), let's break
them into helper functions.

Signed-off-by: Cong Yang <yangcong5@huaqin.corp-partner.google.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20240704045017.2781991-4-yangcong5@huaqin.corp-partner.google.com


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240704045017.2781991-4-yangcong5@huaqin.corp-partner.google.com