iommu/mediatek-v1: Add error handle for mtk_iommu_probe

iommu/mediatek-v1: Add error handle for mtk_iommu_probe

[ Upstream commit 3c0c466f63dc0daaa115c7552d857e3a0f49a647 ]

In the original code, we lack the error handle. This patch adds them.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Link: https://lore.kernel.org/r/20210412064843.11614-2-yong.wu@mediatek.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Stable-dep-of: 142e821f68cf ("iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()")
Signed-off-by: Sasha Levin <sashal@kernel.org>