wifi: ath12k: Remove the unused argument from the Rx data path

wifi: ath12k: Remove the unused argument from the Rx data path

Currently, the Rx path uses new infrastructure to extract the required HAL
parameters. Consequently, the HAL Rx descriptor argument is no longer
needed in the following helper functions. Remove the unused argument from
the following helper functions.

ath12k_dp_rx_h_undecap()
ath12k_dp_rx_check_nwifi_hdr_len_valid()
ath12k_wifi7_dp_rx_h_mpdu()

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6-01243-QCAHKSWPL_SILICONZ-1

Signed-off-by: Karthikeyan Periyasamy <karthikeyan.periyasamy@oss.qualcomm.com>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20260227042128.3494167-1-karthikeyan.periyasamy@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>