wlan: Interface file changes to send correct rssi value.

Add correct data-type for rssi variable to provide correct rssi
value, while populating batch scan results.

Change-Id: I771b8622f4ab8555595e63095dc146f968a0d551
CRs-fixed: 665851
diff --git a/riva/inc/wlan_hal_msg.h b/riva/inc/wlan_hal_msg.h
index a2c43d6..05da3a3 100644
--- a/riva/inc/wlan_hal_msg.h
+++ b/riva/inc/wlan_hal_msg.h
@@ -4173,7 +4173,7 @@
     tANI_U8   bssid[6];     /* BSSID */
     tANI_U8   ssid[33];     /* SSID */
     tANI_U8   ch;           /* Channel */
-    tANI_U8   rssi;         /* RSSI or Level */
+    tANI_S8   rssi;         /* RSSI or Level */
     /* Timestamp when Network was found. Used to calculate age based on timestamp in GET_RSP msg header */
     tANI_U32  timestamp;
 } tHalBatchScanNetworkInfo, *tpHalBatchScanNetworkInfo;