wifi: ath12k: Request beacon stats from firmware

Add support to request and dump beacon statistics from firmware

Sample output:
-------------
cat /sys/kernel/debug/ath12k/pci-0000:06:00.0/mac0/fw_stats/beacon_stats

           ath12k Beacon stats (1)
           ===================

                       VDEV ID 0
              VDEV MAC address 00:03:7f:04:37:58
              ================

      Num of beacon tx success 20
     Num of beacon tx failures 0

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-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: Ramya Gnanasekar <ramya.gnanasekar@oss.qualcomm.com>
Reviewed-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Link: https://patch.msgid.link/20250124185330.1244585-3-ramya.gnanasekar@oss.qualcomm.com


Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>