s390/sclp: detect cmma

Let's detect the Collaborative-memory-management-interpretation facility,
aka CMM assist, so we can correctly enable cmma later.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 076f631..fa40ac8 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -62,6 +62,7 @@
 	unsigned char has_sief2 : 1;
 	unsigned char has_64bscao : 1;
 	unsigned char has_gpere : 1;
+	unsigned char has_cmma : 1;
 	unsigned int ibc;
 	unsigned int mtid;
 	unsigned int mtid_cp;