MAINTAINERS: drm-meson: Update git entries

Add the main git entry and the drm-misc experiment git for small
patches.

Cc: Daniel Vetter <[email protected]>
Signed-off-by: Neil Armstrong <[email protected]>
Acked-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
1 file changed