wifi: ath12k: Request pdev stats from firmware

wifi: ath12k: Request pdev stats from firmware

Add support to request pdev stats from firmware through WMI and
print the information

Sample Output:
-------------
cat /sys/kernel/debug/ath12k/pci-0000\:06\:00.0/mac0/fw_stats/pdev_stats

             ath12k PDEV stats
             =================

           Channel noise floor        -85
              Channel TX power        126
                TX frame count          0
                RX frame count       8637
                RX clear count      37424
                   Cycle count    4372024
               PHY error count          0
                soc drop count          0

          ath12k PDEV TX stats
          ====================

            HTT cookies queued          0
             HTT cookies disp.          0
                   MSDU queued          0
                   MPDU queued          0
                 MSDUs dropped          0
                  Local enqued          0
                   Local freed          0
                     HW queued          0
                  PPDUs reaped          0
                 Num underruns          0
                 PPDUs cleaned          0
                MPDUs requeued          0
             Excessive retries          0
                       HW rate          0
           Sched self triggers          0
     Dropped due to SW retries          0
       Illegal rate phy errors          0
        PDEV continuous xretry          0
                    TX timeout          9
                   PDEV resets          0
 Stateless TIDs alloc failures          0
                  PHY underrun          0
  MPDU is more than txop limit          0

          ath12k PDEV RX stats
          ====================

         Mid PPDU route change          0
       Tot. number of statuses          0
        Extra frags on rings 0          0
        Extra frags on rings 1          0
        Extra frags on rings 2          0
        Extra frags on rings 3          0
        MSDUs delivered to HTT          0
        MPDUs delivered to HTT          0
      MSDUs delivered to stack          0
      MPDUs delivered to stack          0
               Oversized AMSUs          0
                    PHY errors          0
              PHY errors drops          0
   MPDU errors (FCS, MIC, ENC)          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/20250124185330.1244585-4-ramya.gnanasekar@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>