ACPI: call acpi_system_init() explicitly rather than as initcall

This patch makes acpi_init() call acpi_system_init() directly.
Previously, both were subsys_initcalls.  acpi_system_init()
must happen after acpi_init(), and it's better to call it
explicitly rather than rely on link ordering.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/bus.c

@@ -882,6 +882,7 @@ static int __init acpi_init(void)
 	acpi_scan_init();
 	acpi_ec_init();
 	acpi_power_init();
+	acpi_system_init();
 	return result;
 }
 

drivers/acpi/internal.h

@@ -1,6 +1,7 @@
 /* For use by Linux/ACPI infrastructure, not drivers */
 
 int acpi_scan_init(void);
+int acpi_system_init(void);
 
 /* --------------------------------------------------------------------------
                                   Power Resource

drivers/acpi/system.c

@@ -571,12 +571,9 @@ static int acpi_system_procfs_init(void)
 }
 #endif
 
-static int __init acpi_system_init(void)
+int __init acpi_system_init(void)
 {
-	int result = 0;
-
-	if (acpi_disabled)
-		return 0;
+	int result;
 
 	result = acpi_system_procfs_init();
 	if (result)
@@ -586,5 +583,3 @@ static int __init acpi_system_init(void)
 
 	return result;
 }
-
-subsys_initcall(acpi_system_init);