drm/panel: Add driver for Samsung S6E63M0 panel

This patch adds Samsung S6E63M0 AMOLED LCD panel driver, connected over
spi. It's based on already removed, non-device-tree S6E63M0 driver and
panel-samsung-ld9040. It can be found for example in some of Samsung
Aries based phones.

Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190222175153.20567-2-pawel.mikolaj.chmiel@gmail.com