wifi: ath12k: cleanup Rx peer statistics structure

wifi: ath12k: cleanup Rx peer statistics structure

Currently, unused fields are present in the Rx peer statistics
structure. These fields are already present in the same structure
under the ath12k_rx_peer_rate_stats container structure. Therefore,
remove the unused fields from the Rx peer statistics structure.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Acked-by: Kalle Valo <kvalo@kernel.org>
Link: https://patch.msgid.link/20241217084511.2981515-4-quic_periyasa@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>