[PATCH] drivers/base/: proper prototypes

This patch contains the following changes:
- move prototypes to base.h
- sys.c should #include "base.h" for getting the prototype of it's
  global function system_bus_init()

Note that hidden in this patch there's a bugfix:

Caller and callee disagreed regarding the return type of
sysdev_shutdown().

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/base/power/resume.c b/drivers/base/power/resume.c
index 0a7aa07..317edbf 100644
--- a/drivers/base/power/resume.c
+++ b/drivers/base/power/resume.c
@@ -9,10 +9,9 @@
  */
 
 #include <linux/device.h>
+#include "../base.h"
 #include "power.h"
 
-extern int sysdev_resume(void);
-
 
 /**
  *	resume_device - Restore state for one device.