wlan: Interface changes for PER based roam full scan

DUT should do a full scan if it is not able to find candidate
AP from the roam cache list. This full scan has to be done when
there is significant RSSI change which is configurable via ini.

Add interface changes for config paramer upon which full scan
will be done.

Change-Id: Ifb2acf41eb226f0223515d97ef995eb0bddfeb55
CRs-Fixed: 1059278
diff --git a/riva/inc/wlan_hal_msg.h b/riva/inc/wlan_hal_msg.h
index 820f0ac..581862c 100644
--- a/riva/inc/wlan_hal_msg.h
+++ b/riva/inc/wlan_hal_msg.h
@@ -9008,7 +9008,8 @@
     tANI_U32 waitPeriodForNextPERScan;
     tANI_U32 PERtimerThreshold;
     tANI_U32 PERroamTriggerPercent;
-    tANI_U32 reserved;
+    tANI_S16 PERRoamFullScanThreshold;
+    tANI_U16 reserved;
 } tPerRoamConfigParams, * tpPerRoamConfigParams;
 
 typedef PACKED_PRE struct PACKED_POST