wlan: send correct rssi value while sending batch scan results.

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

Change-Id: I824f1a41680a5458cbaa115885b17925a209a38b
CRs-fixed: 665851.
diff --git a/CORE/HDD/inc/wlan_hdd_main.h b/CORE/HDD/inc/wlan_hdd_main.h
index 61f60e8..18d7dee 100644
--- a/CORE/HDD/inc/wlan_hdd_main.h
+++ b/CORE/HDD/inc/wlan_hdd_main.h
@@ -813,7 +813,7 @@
     /*Channel*/
     tANI_U8  ch;
     /*RSSI or Level*/
-    tANI_U8  rssi;
+    tANI_S8  rssi;
     /*Age*/
     tANI_U32 age;
 }tHDDbatchScanRspApInfo;
diff --git a/CORE/MAC/inc/sirApi.h b/CORE/MAC/inc/sirApi.h
index 8c863b9..8b8bd0c 100644
--- a/CORE/MAC/inc/sirApi.h
+++ b/CORE/MAC/inc/sirApi.h
@@ -4689,7 +4689,7 @@
     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;