drm/meson: fix missing component unbind on bind errors

Make sure to unbind all subcomponents when binding the aggregate device
fails.

Fixes: a41e82e6 ("drm/meson: Add support for components")
Cc: stable@vger.kernel.org      # 4.12
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230306103533.4915-1-johan+linaro@kernel.org