drm/panel: boe-th101mb31ig002: use wrapped MIPI DCS functions

drm/panel: boe-th101mb31ig002: use wrapped MIPI DCS functions

Remove conditional code and always use mipi_dsi_dcs_*multi() wrappers to
simplify driver's init/enable/exit code.

Convert the hex in init_code from UPPERCASE to lowercase.

Signed-off-by: Zhaoxiong Lv <lvzhaoxiong@huaqin.corp-partner.google.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240709134754.28013-4-lvzhaoxiong@huaqin.corp-partner.google.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240709134754.28013-4-lvzhaoxiong@huaqin.corp-partner.google.com