Driver core: proper prototype for drivers/base/init.c:driver_init()

Add a prototype for driver_init() in include/linux/device.h.

Also remove a static function of the same name in drivers/acpi/ibm_acpi.c to
ibm_acpi_driver_init() to fix the namespace collision.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/init/main.c b/init/main.c
index e3f0bb2..2b1cdaa 100644
--- a/init/main.c
+++ b/init/main.c
@@ -53,6 +53,7 @@
 #include <linux/utsrelease.h>
 #include <linux/pid_namespace.h>
 #include <linux/compile.h>
+#include <linux/device.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
@@ -94,7 +95,6 @@
 extern void prio_tree_init(void);
 extern void radix_tree_init(void);
 extern void free_initmem(void);
-extern void driver_init(void);
 extern void prepare_namespace(void);
 #ifdef	CONFIG_ACPI
 extern void acpi_early_init(void);