media: platform: mtk-mdp3: fix device leaks at probe

media: platform: mtk-mdp3: fix device leaks at probe

Make sure to drop the references taken when looking up the subsys
devices during probe on probe failure (e.g. probe deferral) and on
driver unbind.

Similarly, drop the SCP device reference after retrieving its platform
data during probe to avoid leaking it.

Note that holding a reference to a device does not prevent its driver
data from going away.

Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Cc: stable@vger.kernel.org	# 6.1
Cc: Moudy Ho <moudy.ho@mediatek.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>