target-i386: Fix mask of pte index in memory mapping

Function walk_pte() needs pte index to calculate virtual address.
However, pte index of PAE paging or IA-32e paging is 9 bit, so the mask
should be 0x1ff.
Signed-off-by: NQiao Nuohan <qiaonuohan@cn.fujitsu.com>
Reviewed-by: NJesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

target-i386/arch_memory_mapping.c

@@ -38,7 +38,7 @@ static void walk_pte(MemoryMappingList *list, hwaddr pte_start_addr,
             continue;
         }
 
-        start_vaddr = start_line_addr | ((i & 0x1fff) << 12);
+        start_vaddr = start_line_addr | ((i & 0x1ff) << 12);
         memory_mapping_list_add_merge_sorted(list, start_paddr,
                                              start_vaddr, 1 << 12);
     }