wlan: Crash device only if gSsrPanicOnFailure is enabled

When vos_start()/vos_stop() fails driver crashes device.
This behaviour is not acceptable in certain user testcase, for
example when testing is done without IRIS card.
On vos_start()/vos_stop() failure, crash device only if ini param,
gSsrPanicOnFailure is enabled.

Change-Id: I8c48ce4edcf48f62ff7ba9c58e4e4feb480e00d5
CRs-Fixed: 975491
diff --git a/CORE/HDD/src/wlan_hdd_main.c b/CORE/HDD/src/wlan_hdd_main.c
index adeeba3..ef0a520 100755
--- a/CORE/HDD/src/wlan_hdd_main.c
+++ b/CORE/HDD/src/wlan_hdd_main.c
@@ -8903,7 +8903,8 @@
       VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL,
          "%s: Failed to stop VOSS",__func__);
       VOS_ASSERT( VOS_IS_STATUS_SUCCESS( vosStatus ) );
-      VOS_BUG(0);
+      if (isSsrPanicOnFailure())
+          VOS_BUG(0);
    }
 
    //This requires pMac access, Call this before vos_close().
@@ -10308,7 +10309,8 @@
    if ( !VOS_IS_STATUS_SUCCESS( status ) )
    {
       hddLog(VOS_TRACE_LEVEL_FATAL,"%s: vos_start failed",__func__);
-      VOS_BUG(0);
+      if (isSsrPanicOnFailure())
+          VOS_BUG(0);
       goto err_vosclose;
    }