Move timekeeping code to timekeeping.c

Move the timekeeping code out of kernel/timer.c and into
kernel/time/timekeeping.c.  I made no cleanups or other changes in transit.

[akpm@linux-foundation.org: build fix]
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/time.h b/include/linux/time.h
index 8ea8dea..50e31b1 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -119,6 +119,7 @@
 
 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
 extern int timekeeping_is_continuous(void);
+extern void update_wall_time(void);
 
 /**
  * timespec_to_ns - Convert timespec to nanoseconds