Set SYSTEM_RESCLK_DISABLE as workaround

Change-Id: I4c8c7b5fd4e9e12919110922a77223bf0eec1696
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/42620
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/usr/isteps/istep15/host_build_stop_image.C

@@ -377,6 +377,10 @@ void* host_build_stop_image (void *io_pArgs)
         TARGETING::targetService().getTopLevelTarget(l_sys);
         assert( l_sys != NULL );
 
+        // @todo RTC:176627 Remove workaround setting SYSTEM_RESCLK_DISABLE
+        l_sys->setAttr<TARGETING::ATTR_SYSTEM_RESCLK_DISABLE>(0x1);
+        // end workaround
+
         if (l_sys->getAttr<TARGETING::ATTR_IS_MPIPL_HB>())
         {
             l_errl = HBPM::resetPMAll();