drm/meson: Add RST to bring together kerneldoc

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/Documentation/gpu/index.rst b/Documentation/gpu/index.rst
index d81c6ff..c572f09 100644
--- a/Documentation/gpu/index.rst
+++ b/Documentation/gpu/index.rst
@@ -11,6 +11,7 @@
    drm-kms-helpers
    drm-uapi
    i915
+   meson
    tinydrm
    vc4
    vga-switcheroo