[power] Divorce suspend console code from swsusp.

- Create kernel/power/console.c
- Rename prepare_suspend_console() to pm_prepare_console() and 
  restore_console() to pm_restore_console().
- Add prototypes to include/linux/suspend.h.
- Make kernel/power/console.o dependent only on CONFIG_PM
- Simplify logic for SUSPEND_CONSOLE define
- Make software_resume() prepare console much earlier, so we can localize
  the loglevel variables in console.c. 
- Remove #ifdef CONFIG_VT from console.c, and just check for SUSPEND_CONSOLE.
  (Perhaps we should make entire file dependent on CONFIG_VT_CONSOLE?)
- Add kernel/power/power.h to share things across local files.

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 864067f87aa8..03340682a466 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -85,6 +85,10 @@ static inline void software_suspend(void)
 extern void refrigerator(unsigned long);
 extern int freeze_processes(void);
 extern void thaw_processes(void);
+
+extern int pm_prepare_console(void);
+extern void pm_restore_console(void);
+
 #else
 static inline void refrigerator(unsigned long)
 {