SMF: Temporary Put HOMER In Non-Secure Memory

Skiboot is having difficulties reading OCC Common
area from secure memory. This commit puts HOMER
memory back in non-secure area (at all times) for
the time being while the skiboot team figures out
what's wrong.

Change-Id: Ieda0fbb22a851cc8a5e66cf9c02c1932b29de99f
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/69416
Tested-by: Jenkins Server <pfd-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>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Matthew Raybuck <mraybuc@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <bofferdn@us.ibm.com>
Reviewed-by: Michael Baiocchi <mbaiocch@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/usr/isteps/istep15/host_build_stop_image.C

@@ -441,7 +441,7 @@ void* host_build_stop_image (void *io_pArgs)
         //If running Sapphire need to place this at the top of memory instead
         if(is_sapphire_load())
         {
-            l_memBase = get_top_homer_mem_addr();
+            l_memBase = get_top_mem_addr();
             assert (l_memBase != 0,
                     "host_build_stop_image: Top of memory was 0!");
             l_memBase -= VMM_ALL_HOMER_OCC_MEMORY_SIZE;