t4_os_find_pci_capability
int t4_os_find_pci_capability(struct adapter *, int);
pcie_cap = t4_os_find_pci_capability(adapter, PCI_CAP_ID_EXP);
pcie_cap = t4_os_find_pci_capability(adapter, PCI_CAP_ID_EXP);
t4_os_find_pci_capability(adapter, PCI_CAP_ID_VPD);