ACPICA: re-factor table init routines for benefit of iASL

Required new table init interface since iASL does not use RSDP/XSDT.

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

include/acpi/actables.h

@@ -44,6 +44,8 @@
 #ifndef __ACTABLES_H__
 #define __ACTABLES_H__
 
+acpi_status acpi_allocate_root_table(u32 initial_table_count);
+
 /*
  * tbfadt - FADT parse/convert/validate
  */