wifi: ath12k: support ARP and NS offload

Support ARP and NS offload in WoW state.

Tested this way: put machine A with QCA6390 to WoW state,
ping/ping6 machine A from another machine B, check sniffer to see
any ARP response and Neighbor Advertisement from machine A.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://patch.msgid.link/20240604055407.12506-7-quic_bqiang@quicinc.com