Skip RINGOVD completely if we're in secure mode

Added a big hammer to skip the RINGOVD logic until we sort out
how to best handle lids and pnor sections securely.

Change-Id: Ibb78fab8bf7e1546d6f891383ac5d674aa65148d
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/43231
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Michael Baiocchi <mbaiocch@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <bofferdn@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Dean Sanner <dsanner@us.ibm.com>

src/usr/isteps/pm/pm_common.C

@@ -1072,6 +1072,15 @@ namespace HBPM
         do {
             io_overrideImg = nullptr;
 
+            //@fixme - RTC:177372
+            // Block any use of overrides if we're secure
+            if( PNOR::isInhibitedSection(PNOR::RINGOVD) )
+            {
+                TRACFCOMP( ISTEPS_TRACE::g_trac_isteps_trace,
+                           "getRingOvd: ignore overrides in secure mode" );
+                break;
+            }
+
             uint32_t l_lidId = Util::HWREFIMG_RINGOVD_LIDID;
             if(g_pRingOvdLidMgr.get() == nullptr)
             {