ath11k: add software monitor ring descriptor for full monitor

In full monitor mode, monitor destination ring is read in
software monitor ring descriptor format instead of
reo_entrance_ring format. Add new sw_mon_ring descriptor.

Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1-01734-QCAHKSWPL_SILICONZ-1

Signed-off-by: Anilkumar Kolli <akolli@codeaurora.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/1638881695-22155-3-git-send-email-akolli@codeaurora.org