qcacmn: Add support for 'he_ltf' command

Currently, we do not have support for 'he_ltf' command. But we need
this command for certain IOP testcases. Add support for 'he_ltf'
command.

Change-Id: I296b18762aaa52da80a5755c5bcca8dbd12d9b13
CRs-fixed: 2118948

wmi_unified_tlv.c

@@ -20301,6 +20301,7 @@ static void populate_vdev_param_tlv(uint32_t *vdev_param)
 	vdev_param[wmi_vdev_param_proxy_sta] = WMI_VDEV_PARAM_PROXY_STA;
 	vdev_param[wmi_vdev_param_bw_nss_ratemask] =
 					WMI_VDEV_PARAM_BW_NSS_RATEMASK;
+	vdev_param[wmi_vdev_param_set_he_ltf] = WMI_VDEV_PARAM_HE_LTF;
 }
 #endif