ARM_SMMU_GR0_sGFSYNR2
case ARM_SMMU_GR0_sGFSYNR2:
gfsynr2 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR2);
gfsynr2 = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_sGFSYNR2);