wifi: ath12k: update beacon template function to use arvif structure

wifi: ath12k: update beacon template function to use arvif structure

The current code has ath12k_wmi_bcn_tmpl() accepting separate ar and
vdev_id parameters. However, ath12k_link_vif structure can be used to
derive both of these.

Hence, simplify the function signature.

Later change needs arvif pointer access within the function hence it is
better if arvif is directly passed now.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1

Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Link: https://patch.msgid.link/20250124-ath12k_mlo_csa-v2-1-420c42fcfecf@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>