drm/meson: remove useless recursive components matching

The initial design was recursive to cover all port/endpoints, but only the first layer
of endpoints should be covered by the components list.
This also breaks the MIPI-DSI init/bridge attach sequence, thus only parse the
first endpoints instead of recursing.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211020123947.2585572-3-narmstrong@baylibre.com