PNP: make pnpbios core explicitly non-modular

The Kconfig currently controlling compilation of this code is:

config PNPBIOS
        bool "Plug and Play BIOS support"

...meaning that it currently is not being built as a module by anyone.

Lets remove the couple traces of modularity, so that when reading the
driver there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/pnp/pnpbios/core.c

@@ -46,7 +46,6 @@
  */
 
 #include <linux/types.h>
-#include <linux/module.h>
 #include <linux/init.h>
 #include <linux/linkage.h>
 #include <linux/kernel.h>
@@ -587,6 +586,6 @@ static int __init pnpbios_thread_init(void)
 }
 
 /* Start the kernel thread later: */
-module_init(pnpbios_thread_init);
+device_initcall(pnpbios_thread_init);
 
 EXPORT_SYMBOL(pnpbios_protocol);