T7819: VPP do not override driver if it is already done

The upstream VPP code already writes the ena device ID to new_id
So we can remove `ena` from `override_driver()`

The kernel does not provide a reliable way to check whether an ID has already been
registered, so we simply attempt the write and ignore the FileExistsError.
Any other failure is treated as a warning.

Fixes this case:

Traceback (most recent call last):
  File "/usr/libexec/vyos/services/vyos-configd", line 156, in run_script
    script.apply(c)
  File "/usr/libexec/vyos/conf_mode/vpp.py", line 613, in apply
    control_host.override_driver(
  File "/usr/lib/python3/dist-packages/vyos/vpp/control_host.py", line 138, in override_driver
    Path('/sys/module/vfio_pci/drivers/pci:vfio-pci/new_id').write_text(
  File "/usr/lib/python3.11/pathlib.py", line 1079, in write_text
    with self.open(mode='w', encoding=encoding, errors=errors, newline=newline) as f:
FileExistsError: [Errno 17] File exists

0 files changed, 0 insertions, 0 deletions