Merge branch 'eth-fbnic-add-timestamping-support'

Vadim Fedorenko says:

====================
eth: fbnic: add timestamping support

The series is to add timestamping support for Meta's NIC driver.

Changelog:
v3 -> v4:
- use adjust_by_scaled_ppm() instead of open coding it
- adjust cached value of high bits of timestamp to be sure it
  is older then incoming timestamps
v2 -> v3:
- rebase on top of net-next
- add doc to describe retur value of fbnic_ts40_to_ns()
v1 -> v2:
- adjust comment about using u64 stats locking primitive
- fix typo in the first patch
- Cc Richard
====================

Link: https://patch.msgid.link/20241008181436.4120604-1-vadfed@meta.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>