PCI_DVSEC_CXL_PORT_CTL
rc = pci_read_config_word(dev, dvsec + PCI_DVSEC_CXL_PORT_CTL, ®);
rc = pci_read_config_word(bridge, dvsec + PCI_DVSEC_CXL_PORT_CTL, ®);
pci_write_config_word(bridge, dvsec + PCI_DVSEC_CXL_PORT_CTL,
pci_write_config_word(bridge, dvsec + PCI_DVSEC_CXL_PORT_CTL,