[S390] convert s390 to generic IPI infrastructure

Since etr/stp don't need the old smp_call_function semantics anymore
we can convert s390 to the generic IPI infrastructure.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/sigp.h b/arch/s390/include/asm/sigp.h
index e16d56f..ec403d4 100644
--- a/arch/s390/include/asm/sigp.h
+++ b/arch/s390/include/asm/sigp.h
@@ -61,6 +61,7 @@
 {
 	ec_schedule=0,
 	ec_call_function,
+	ec_call_function_single,
 	ec_bit_last
 } ec_bit_sig;