ARM_SMMU_FEAT_2_LVL_CDTAB
if (!(smmu->features & ARM_SMMU_FEAT_2_LVL_CDTAB) ||
if (!(smmu->features & ARM_SMMU_FEAT_2_LVL_CDTAB))
smmu->features |= ARM_SMMU_FEAT_2_LVL_CDTAB;