MAINTAINERS: drm-meson: Update git entries

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

Cc: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1488360018-16835-1-git-send-email-narmstrong@baylibre.com

MAINTAINERS

@@ -4184,6 +4184,8 @@ W:	http://linux-meson.com/
 S:	Supported
 F:	drivers/gpu/drm/meson/
 F:	Documentation/devicetree/bindings/display/amlogic,meson-vpu.txt
+T:	git git://anongit.freedesktop.org/drm/drm-meson
+T:	git git://anongit.freedesktop.org/drm/drm-misc
 
 DRM DRIVERS FOR EXYNOS
 M:	Inki Dae <inki.dae@samsung.com>