iavf: rte_eth_stats_get() fails upon upgrade to 23.07.0

[Isaac Boukris]

Hello,

This works fine with 23.03.0 but starting from 23.07.0 up to master it
fails as follows.

Initialization is ok:
EAL: Probe PCI driver: net_iavf (8086:154c) device: 0000:09:00.0 (socket -1)
iavf_set_rx_function(): request RXDID[1] in Queue[0] is legacy, set
rx_pkt_burst as legacy for all queues

telemetry.py /ethdev/link_status,0 | jq
  {
    "/ethdev/link_status": {
      "status": "UP",
      "speed": 40000,
      "duplex": "full-duplex"
    }
  }

But the following command hang and fail:
telemetry.py /ethdev/stats,0 | jq
telemetry.py /ethdev/xstats,0 | jq

On the logs I see:
iavf_execute_vf_cmd(): No response for cmd 15
iavf_query_stats(): fail to execute command OP_GET_STATS
iavf_dev_stats_get(): Get statistics failed

Any ideas?

Thanks!