ACPI: add __init to acpi_initialize_subsystem()

Add __init to:
acpi_initialize_subsystem() (and un-export it)
acpi_os_initialize()

Add __initdata to:
acpi_osl_dmi_table[]

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index de26ee1..ca882b8 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -78,7 +78,7 @@
 /*
  * OSL Initialization and shutdown primitives
  */
-acpi_status acpi_os_initialize(void);
+acpi_status __initdata acpi_os_initialize(void);
 
 acpi_status acpi_os_terminate(void);