media: platform: mtk-mdp3: fix error handling in mdp_probe()

media: platform: mtk-mdp3: fix error handling in mdp_probe()

[ Upstream commit 82b7d4b5d393d6654148e885efca0a3df63806f6 ]

Adjust label "err_return" order to avoid double freeing, and
add two labels for easy traceability.

Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Signed-off-by: Moudy Ho <moudy.ho@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>