wlan: Add config parameter 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 changes for config paramer upon which full scan will be done.

CRs-Fixed: 1059278
Change-Id: Ia7b069f18560bebf3a593510bbd4babb293ea8b5
diff --git a/CORE/WDI/CP/inc/wlan_qct_wdi.h b/CORE/WDI/CP/inc/wlan_qct_wdi.h
index b44e3f7..6f0864d 100644
--- a/CORE/WDI/CP/inc/wlan_qct_wdi.h
+++ b/CORE/WDI/CP/inc/wlan_qct_wdi.h
@@ -5592,6 +5592,7 @@
   wpt_uint32  waitPeriodForNextPERScan;
   wpt_uint32  PERtimerThreshold;
   wpt_uint32  PERroamTriggerPercent;
+  wpt_int16   PERRoamFullScanThreshold;
 } WDI_PERRoamOffloadScanInfo;
 
 typedef struct