Implement the offload of the tc mqprio hw queue priority in the stmmac
driver. This feature requires the mqprio to be configured in channel
mode.
Do not overwrite real_num_tx_queues configured by the qdisc in
stmmac_hw_setup().

---
Changes in v2:
- Forbid cbs queue offload if mqprio is already enabled.
- SP requires 1:1 TC to TXQ map.
- Fix the real_num_tx_queue overwrite during device open.
- Require the qdisc to be configured in channel mode to enable hw queue
  priority offload in order to not introduce any regression in the
  previous driver behaviour.
- Link to v1: https://lore.kernel.org/r/20260918-stmmac-mqprio-prio-offload-v1-1-5328157fcb58@oss.qualcomm.com

---
Lorenzo Bianconi (2):
      net: stmmac: add tc mqprio hw queue priority offload
      net: stmmac: align real_num_tx_queues to mqprio configuration

 drivers/net/ethernet/stmicro/stmmac/stmmac.h      |   7 ++
 drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c  |   2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |  28 +++--
 drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c   | 132 ++++++++++++++++++++--
 4 files changed, 146 insertions(+), 23 deletions(-)
---
base-commit: 6516ac5e6b164bf78fb34d36b4d84d495a07c844
change-id: 20260918-stmmac-mqprio-prio-offload-3d82d87f7bc8

Best regards,
-- 
Lorenzo Bianconi <lorenzo.bianconi@oss.qualcomm.com>