qcacmn: Added wmi vdev param for setting sifs rate in target

This change is required as a part of setting sifs_rate in the
target through wmi command from host for legacy chipsets.

Change-Id: Ia3ed8a6d33fcb31b290129e1302dfc0000ad4626
CRs-Fixed: 2031293

wmi_unified_non_tlv.c

@@ -9611,6 +9611,8 @@ static void populate_vdev_param_non_tlv(uint32_t *vdev_param)
 		WMI_VDEV_PARAM_DISABLE_CABQ;
 	vdev_param[wmi_vdev_param_amsdu_subframe_size_per_ac] =
 		WMI_VDEV_PARAM_AMSDU_SUBFRAME_SIZE_PER_AC;
+	vdev_param[wmi_vdev_param_sifs_trigger_rate] =
+		WMI_VDEV_PARAM_SIFS_TRIGGER_RATE;
 }
 #endif