[S390] s390: rename CPU_IDLE to S390_CPU_IDLE

sched-cfs-v2.6.22-git-v18.patch introduces CPU_IDLE in sched.h.
This conflict with the already existing define in
include/asm-s390/processor.h
Just rename the s390 defines, since they will go away as soon as
we support CONFIG_NO_HZ instead of our own CONFIG_NO_IDLE_HZ.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 1e1a6ee..b6ed143 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -545,10 +545,10 @@
 			      unsigned long action, void *hcpu)
 {
 	switch (action) {
-	case CPU_IDLE:
+	case S390_CPU_IDLE:
 		stop_cpu_timer();
 		break;
-	case CPU_NOT_IDLE:
+	case S390_CPU_NOT_IDLE:
 		start_cpu_timer();
 		break;
 	}