wifi: ath12k: Support pdev CCA Stats

Add support to request CCA stats for physical devices from firmware
through HTT stats type 19. These stats give information about
channel number, number of records, counters' bitmap, collection
interval and different CCA counters.

Sample output:
-------------
echo 19 > /sys/kernel/debug/ath12k/pci-0000\:06\:00.0/mac0/htt_stats_type
cat /sys/kernel/debug/ath12k/pci-0000\:06\:00.0/mac0/htt_stats
HTT_PDEV_CCA_STATS_HIST_TLV (1s):
chan_num = 5955
num_records = 10
valid_cca_counters_bitmap = 0xff
collection_interval = 1000

HTT_PDEV_STATS_CCA_COUNTERS_TLV:(in usec)
tx_frame_usec = 0
rx_frame_usec = 0
rx_clear_usec = 999955
my_rx_frame_usec = 0
usec_cnt = 999955
med_rx_idle_usec = 0
med_tx_idle_global_usec = 0
cca_obss_usec = 999955
.....

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Dinesh Karthikeyan <quic_dinek@quicinc.com>
Signed-off-by: Roopni Devanathan <quic_rdevanat@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://patch.msgid.link/20241005101816.3314728-5-quic_rdevanat@quicinc.com


Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>