XHCI_EXT_CAPS_LEGACY
offset = xhci_find_next_ext_cap(xdbc.xhci_base, 0, XHCI_EXT_CAPS_LEGACY);
ext_cap_offset = xhci_find_next_ext_cap(base, 0, XHCI_EXT_CAPS_LEGACY);
xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_LEGACY,