Merge branch 'net-wangxun-more-ethtool'

Jiawen Wu says:

====================
Implement more ethtool_ops for Wangxun

Provide ethtool functions to operate pause param, ring param, coalesce
channel number and msglevel, for driver txgbe/ngbe.

v6 -> v7:
- Rebase on net-next.

v5 -> v6:
- Minor fixes address on Jakub Kicinski's comments.

v4 -> v5:
- Fix build error reported by kernel test robot.

v3 -> v4:
- Repartition the patches of phylink.
- Handle failure to allocate memory while changing ring parameters.
- Minor fixes about formatting.

v2 -> v3:
- Address comments:
  https://lore.kernel.org/all/ZW2loxTO6oKNYLew@shell.armlinux.org.uk/

v1 -> v2:
- Add phylink support for ngbe.
- Fix issue on interrupts when queue number is changed.
- Add more marco defines.
- Fix return codes.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>