drm/mipi-dsi: Add mipi_dsi_dcs_set_tear_scanline_multi

mipi_dsi_dcs_set_tear_scanline_multi can heavily benefit from being
converted to a multi style function as it is often called in the context of
similar functions.

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Tejas Vipin <tejasvipin76@gmail.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240818060816.848784-2-tejasvipin76@gmail.com