[S390] Convert to smp_call_function_single.

smp_call_function_single now has the same semantics as s390's
smp_call_function_on. Therefore convert to the *single variant
and get rid of some architecture specific code.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index 76e424f..07708c0 100644
--- a/include/asm-s390/smp.h
+++ b/include/asm-s390/smp.h
@@ -36,8 +36,7 @@
 extern void machine_power_off_smp(void);
 
 extern void smp_setup_cpu_possible_map(void);
-extern int smp_call_function_on(void (*func) (void *info), void *info,
-				int nonatomic, int wait, int cpu);
+
 #define NO_PROC_ID		0xFF		/* No processor magic marker */
 
 /*
@@ -96,14 +95,6 @@
 #endif
 
 #ifndef CONFIG_SMP
-static inline int
-smp_call_function_on(void (*func) (void *info), void *info,
-		     int nonatomic, int wait, int cpu)
-{
-	func(info);
-	return 0;
-}
-
 static inline void smp_send_stop(void)
 {
 	/* Disable all interrupts/machine checks */