mmMMVM_L2_CNTL2
tmp = RREG32_SOC15(MMHUB, 0, mmMMVM_L2_CNTL2);
WREG32_SOC15(MMHUB, 0, mmMMVM_L2_CNTL2, tmp);
tmp = RREG32_SOC15(MMHUB, 0, mmMMVM_L2_CNTL2);
WREG32_SOC15(MMHUB, 0, mmMMVM_L2_CNTL2, tmp);