s390/sclp: 64 bit event mask

Change the size of the sclp mask to 64 bits.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/char/sclp.h

@@ -87,7 +87,7 @@ enum sclp_pm_event {
 #define SCLP_PANIC_PRIO		1
 #define SCLP_PANIC_PRIO_CLIENT	0
 
-typedef u32 sccb_mask_t;	/* ATTENTION: assumes 32bit mask !!! */
+typedef u64 sccb_mask_t;
 
 struct sccb_header {
 	u16	length;