sky2_pci_read16
cmd = sky2_pci_read16(hw, cap + PCI_X_CMD);
phy = sky2_pci_read16(hw, PSM_CONFIG_REG4);
pci_err = sky2_pci_read16(hw, PCI_STATUS);
status = sky2_pci_read16(hw, PCI_STATUS);
reg = sky2_pci_read16(hw, PSM_CONFIG_REG3);
reg2 = sky2_pci_read16(hw, PCI_DEV_REG2);