ACPI_SIG_DSDT is acpica internal used only.
call acpi_get_table to avoid using ACPI_SIG_DSDT.
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
        {
                struct acpi_table_header *header = NULL;
 
-               acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
+               acpi_get_table(ACPI_SIG_DSDT, 1, &header);
                BUG_ON(header == NULL);
                sn_acpi_rev = header->oem_revision;
        }
 
        {
                struct acpi_table_header *header;
-               (void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
+               (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
                printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
                        header->oem_revision);
        }