MAINTAINERS: Restore alphabetical sorting

MAINTAINERS got sorted in

  commit 4400b7d6 ("MAINTAINERS: sort entries by entry name")

Merging from drm-next into drm-misc-next duplicated some of the
entries by restoring old, unsorted sections. Restore the sorted
list by removing the duplicates.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 08d99b2c ("Merge drm/drm-next into drm-misc-next")
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Dariusz Marcinkiewicz <darekm@google.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200423074003.9637-1-tzimmermann@suse.de