Merge branch 'net-convert-drivers-to-get_rx_ring_count-part-2'

Breno Leitao says:

====================
net: convert drivers to .get_rx_ring_count (part 2)

Commit 84eaf4359c36 ("net: ethtool: add get_rx_ring_count callback to
optimize RX ring queries") added specific support for GRXRINGS callback,
simplifying .get_rxnfc.

Remove the handling of GRXRINGS in .get_rxnfc() by moving it to the new
.get_rx_ring_count().

This simplifies the RX ring count retrieval and aligns the following
drivers with the new ethtool API for querying RX ring parameters.
  * engleder/tsnep
  * mediatek
  * amazon/ena
  * microchip/lan743x
  * amd/xgbe
  * chelsio/cxgb4
  * wangxun/txgbe
  * cadence/macb

All of these change were compile-tested only.
====================

Link: https://patch.msgid.link/20260115-grxring_big_v2-v1-0-b3e1b58bced5@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>