ACPI: Move all namespace scanning functions from drivers/acpi/bus.c to drivers/acpi/scan.c

Also, trigger bus scanning in acpi_scan_init(), which is made into an initcall.

drivers/acpi/Makefile

@@ -32,7 +32,7 @@ obj-$(CONFIG_ACPI_INTERPRETER)	+= osl.o utils.o \
 #
 # ACPI Bus and Device Drivers
 #
-obj-$(CONFIG_ACPI_BUS)		+= bus.o 
+obj-$(CONFIG_ACPI_BUS)		+= bus.o scan.o
 obj-$(CONFIG_ACPI_AC) 		+= ac.o
 obj-$(CONFIG_ACPI_BATTERY)	+= battery.o
 obj-$(CONFIG_ACPI_BUTTON)	+= button.o

drivers/acpi/acpi_bus.h

@@ -292,7 +292,6 @@ int acpi_bus_generate_event (struct acpi_device *device, u8 type, int data);
 int acpi_bus_receive_event (struct acpi_bus_event *event);
 int acpi_bus_register_driver (struct acpi_driver *driver);
 int acpi_bus_unregister_driver (struct acpi_driver *driver);
-int acpi_bus_scan (struct acpi_device *device);
 
 #endif /*CONFIG_ACPI_BUS*/
 

drivers/acpi/acpi_ksyms.c

@@ -124,6 +124,5 @@ EXPORT_SYMBOL(acpi_bus_generate_event);
 EXPORT_SYMBOL(acpi_bus_receive_event);
 EXPORT_SYMBOL(acpi_bus_register_driver);
 EXPORT_SYMBOL(acpi_bus_unregister_driver);
-EXPORT_SYMBOL(acpi_bus_scan);
 
 #endif /*CONFIG_ACPI_BUS*/