wifi: ath12k: add configure country code for WCN7850

Currently, WMI_SET_INIT_COUNTRY_CMDID is used to set country code for
WCN7850 and QCN9274.

But WMI_SET_INIT_COUNTRY_CMDID is not the correct command for WCN7850.

Add handler to send WMI_SET_CURRENT_COUNTRY_CMDID to firmware, which
is used for WCN7850 to update country code.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kang Yang <quic_kangyang@quicinc.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20250401020840.357-2-quic_kangyang@quicinc.com


Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>