Merge branch 'net-dsa-add-stats64-support'

Merge branch 'net-dsa-add-stats64-support'

Oleksij Rempel says:

====================
net: dsa: add stats64 support

changes v8:
- stats.no_handler should not be assigned from HW stats

changes v7:
- move raw.filtered from rx_errors to rx_dropped counter

changes v6:
- move stats64 callback to ethtool section
- ar9331: diff. fixes
- ar9331: move stats calculation to the worker
- ar9331: extend rx/tx error counters
- use spin lock instead of u64_stats*

changes v5:
- read all stats in one regmap_bulk_read() request
- protect stats with u64_stats* helpers.

changes v4:
- do no read MIBs withing stats64 call
- change polling frequency to 0.3Hz

changes v3:
- fix wrong multiplication
- cancel port workers on remove

changes v2:
- use stats64 instead of get_ethtool_stats
- add worked to poll for the stats
====================

Link: https://lore.kernel.org/r/20210111104658.21930-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>