ARM_SMMU_CB_FSYNR0
fsynr = readl_relaxed(cb_base + ARM_SMMU_CB_FSYNR0);
info->fsynr0 = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_FSYNR0);
cfi->fsynr = arm_smmu_cb_read(smmu, idx, ARM_SMMU_CB_FSYNR0);
fsynr = iommu_readl(ctx, ARM_SMMU_CB_FSYNR0);