qcacmn: Add support for periodic chan stats config command

Add support for sending periodic chan stats config command to target. Once
configured, host will receive the channel stats periodically as per the
configured period

Change-Id: Ic2b4692d0e2662ca590b925732f6cb33aac7a6de
CRs-Fixed: 2136759

wmi_unified_param.h

@@ -4505,6 +4505,7 @@ struct mcast_group_update_params {
 struct periodic_chan_stats_params {
 	uint32_t stats_period;
 	bool enable;
+	uint32_t pdev_id;
 };
 
 /**