[HRTIMER] Fix cpu pointer arg to clockevents_notify()

All of the clockevent notifiers expect a pointer to
an "unsigned int" cpu argument, but hrtimer_cpu_notify()
passes in a pointer to a long.

[ Discussed with and ok by Thomas Gleixner ]
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/hrtimer.c

@@ -1406,7 +1406,7 @@ static void migrate_hrtimers(int cpu)
 static int __cpuinit hrtimer_cpu_notify(struct notifier_block *self,
 					unsigned long action, void *hcpu)
 {
-	long cpu = (long)hcpu;
+	unsigned int cpu = (long)hcpu;
 
 	switch (action) {