iommu/tegra: smmu: Fix error initial value at domain_init
err initial value should be -EAGAIN. Otherwise 2nd iteration always fails in the case as[0] is occupied. Signed-off-by: NHiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
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