qcacmn: Add target_if/wmi implementation of get_stations_stats

Add changes to support get station stats from within the cp stats
component.

Change-Id: I936ea8e18e519f257ae2d57b384a5a39f4582aed
CRs-Fixed: 2210313

wmi_unified_param.h

@@ -5162,6 +5162,12 @@ typedef struct {
  *	*/
 #define WMI_HOST_WLAN_MAX_AC  4
 
+/* The WMI_HOST_MAX_CHAINS macro cannot be changed without breaking WMI
+ * compatibility.
+ * The maximum value of number of chains
+ */
+#define WMI_HOST_MAX_CHAINS   8
+
 /**
  * struct wmi_host_vdev_stats - vdev stats structure
  * @vdev_id: unique id identifying the VDEV, generated by the caller
@@ -5263,6 +5269,21 @@ struct wmi_host_vdev_nac_rssi_event {
 	uint32_t rssi_seq_num;
 };
 
+
+/**
+ * struct wmi_host_per_chain_rssi_stats - VDEV nac rssi stats
+ * @vdev_id: unique id identifying the VDEV, generated by the caller
+ * @rssi_avg_beacon: per chain avg rssi for beacon
+ * @rssi_avg_data: per chain avg rssi for data
+ * @peer_macaddr: peer macaddr
+ */
+struct wmi_host_per_chain_rssi_stats {
+	uint32_t vdev_id;
+	int32_t rssi_avg_beacon[WMI_HOST_MAX_CHAINS];
+	int32_t rssi_avg_data[WMI_HOST_MAX_CHAINS];
+	wmi_host_mac_addr peer_macaddr;
+};
+
 /**
  * struct wmi_host_peer_stats - peer stats
  * @peer_macaddr: peer MAC address