drm/panel: panel-jadard-jd9365da-h3: use wrapped MIPI DCS functions

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

Signed-off-by: Zhaoxiong Lv <lvzhaoxiong@huaqin.corp-partner.google.com>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240624141926.5250-4-lvzhaoxiong@huaqin.corp-partner.google.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240624141926.5250-4-lvzhaoxiong@huaqin.corp-partner.google.com