wifi: ath12k: Support BE OFDMA Pdev Rate Stats

wifi: ath12k: Support BE OFDMA Pdev Rate Stats

Add support to request BE OFDMA pdev rate stats from firmware
through HTT stats type 51. These stats give information such
as number of spatial streams, bandwidth, MCS, etc.

Note: WCN7850 firmware version -
WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
does not support HTT stats type 51.

Sample output:
-------------
echo 51 > /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_TX_PDEV_RATE_STATS_BE_OFDMA_TLV:
mac_id = 0
be_ofdma_tx_ldpc = 0
be_ofdma_tx_mcs =  0:0, 1:0, 2:0, 3:0, 4:0, 5:0, 6:0, 7:0, 8:0, 9:0, 10:0, 11:0, 12:0, 13:0, 14:0, 15:0
be_ofdma_eht_sig_mcs =  0:0, 1:0, 2:0, 3:0
be_ofdma_tx_ru_size =  26:0  52:0  52+26:0  106:0  106+26:0  242:0  484:0  484+242:0  996:0  996+484:0  996+484+242:0  996x2:0  996x2+484:0  996x3:0  996x3+484:0  996x4:0
be_ofdma_tx_nss =  =  1:0, 2:0, 3:0, 4:0, 5:0, 6:0, 7:0, 8:0
be_ofdma_tx_bw =  0:0, 1:0, 2:0, 3:0, 4:0
be_ofdma_tx_gi[0] =  0:0, 1:0, 2:0, 3:0, 4:0, 5:0, 6:0, 7:0, 8:0, 9:0, 10:0, 11:0, 12:0, 13:0, 14:0, 15:0
be_ofdma_tx_gi[1] =  0:0, 1:0, 2:0, 3:0, 4:0, 5:0, 6:0, 7:0, 8:0, 9:0, 10:0, 11:0, 12:0, 13:0, 14:0, 15:0
be_ofdma_tx_gi[2] =  0:0, 1:0, 2:0, 3:0, 4:0, 5:0, 6:0, 7:0, 8:0, 9:0, 10:0, 11:0, 12:0, 13:0, 14:0, 15:0
be_ofdma_tx_gi[3] =  0:0, 1:0, 2:0, 3:0, 4:0, 5:0, 6:0, 7:0, 8:0, 9:0, 10:0, 11:0, 12:0, 13:0, 14:0, 15:0

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00214-QCAHKSWPL_SILICONZ-1

Signed-off-by: Pradeep Kumar Chitrapu <quic_pradeepc@quicinc.com>
Signed-off-by: Roopni Devanathan <quic_rdevanat@quicinc.com>
Link: https://patch.msgid.link/20241014070610.3982173-3-quic_rdevanat@quicinc.com
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>