net: atlantic: add AQC113 TX timestamp polling and PTP TX classification

aq_ring.h / aq_ring.c:
- Add ptp_ts_deadline field to aq_ring_s to track TX timestamp timeout.
- In aq_ring_tx_clean(): when hw_ring_tx_ptp_get_ts() returns 0 (HW not
  yet written back the timestamp), clear buff->is_mapped and buff->pa
  before breaking to prevent double dma_unmap on retry.  When
  ptp_ts_deadline expires, dequeue and drop the head of skb_ring to keep
  it in lockstep with buff_ring, then clear request_ts and free the skb
  via dev_kfree_skb_any() to unblock the ring.

aq_main.c:
- Add IPv6 PTP packet detection in aq_ndev_start_xmit() using
  ipv6_hdr()->nexthdr for ETH_P_IPV6 frames, steering them through
  aq_ptp_xmit() alongside the existing IPv4 path.
- Use PTP_EV_PORT/PTP_GEN_PORT constants instead of magic numbers 319/320.
- Remove duplicate aq_reapply_rxnfc_all_rules() and
  aq_filters_vlans_update()
  calls from aq_ndev_open() - now covered by aq_nic_start(), which also
  ensures filters are restored correctly after PM resume.

aq_nic.c:
- Move aq_reapply_rxnfc_all_rules() and aq_filters_vlans_update() into
  aq_nic_start() after hardware init, replacing the duplicate calls that
  were removed from aq_ndev_open().

Signed-off-by: Sukhdeep Singh <sukhdeeps@marvell.com>
Link: https://patch.msgid.link/20260610115448.272-12-sukhdeeps@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions