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 --cc drivers/acpi/osl.c
Simple merge

diff --cc drivers/acpi/utilities/utxface.c
Simple merge

diff --cc include/acpi/acpiosxf.h
Simple merge

diff --cc include/acpi/acpixf.h
Simple merge