MAINTAINERS: add drm/lima driver info

Signed-off-by: Qiang Yu <yuq825@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190329134748.8269-1-yuq825@gmail.com


Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>