drm/panel: simple: Add Innolux TV123WAM panel driver support

Add support for Innolux TV123WAM, which is a 12.3" eDP display panel
with 2160x1440 resolution.

Changes in v1:
 - Add the compatibility string, display_mode and panel_desc
   structures in alphabetical order (Sean Paul).

Signed-off-by: Sandeep Panda <spanda@codeaurora.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1526363564-13823-4-git-send-email-spanda@codeaurora.org