[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/include/asm-s390/processor.h b/include/asm-s390/processor.h
index 5cb480a..3b972d4 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -357,8 +357,8 @@
 /*
  * CPU idle notifier chain.
  */
-#define CPU_IDLE	0
-#define CPU_NOT_IDLE	1
+#define S390_CPU_IDLE		0
+#define S390_CPU_NOT_IDLE	1
 
 struct notifier_block;
 int register_idle_notifier(struct notifier_block *nb);