Fix HBRT reserved memory saving. Need to account for TOC at head.

Change-Id: I3d6babdada72a37430f0d8369b843e3edcd515a6
RTC: 171863
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/41722
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/usr/runtime/populate_hbruntime.C

@@ -622,6 +622,8 @@ errlHndl_t fill_RsvMem_hbData(uint64_t & io_start_address,
         ALIGN_PAGE(l_hbTOC.entry[l_hbTOC.total_entries].size);
     l_hbTOC.total_entries++;
 
+    l_totalSectionSize += sizeof(l_hbTOC);  // Add 4KB Table of Contents
+
     // Fill in PADDING size
     // Now calculate how much padding is needed for 64KB alignment
     // of the whole data section