drm/mediatek: Fix probe device leaks

drm/mediatek: Fix probe device leaks

commit 2a2a04be8e869a19c9f950b89b1e05832a0f7ec7 upstream.

Make sure to drop the reference taken to each component device during
probe on probe failure (e.g. probe deferral) and on driver unbind.

Fixes: 6ea6f8276725 ("drm/mediatek: Use correct device pointer to get CMDQ client register")
Cc: stable@vger.kernel.org	# 5.12
Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20250923152340.18234-4-johan@kernel.org/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>