PCIE_PWR_MGMT_THRESH
val = tr32(PCIE_PWR_MGMT_THRESH) & ~PCIE_PWR_MGMT_L1_THRESH_MSK;
tw32(PCIE_PWR_MGMT_THRESH, val);
tp->pwrmgmt_thresh = tr32(PCIE_PWR_MGMT_THRESH) &
val = tr32(PCIE_PWR_MGMT_THRESH);
tw32(PCIE_PWR_MGMT_THRESH, val);