[S390] zfcp: Report microcode level through service level interface

Register zfcp with the new /proc/service_level interface to report the
FCP microcode level. When the adapter goes offline or a channel path
disappears, zfcp unregisters, since the microcode version might change
and zfcp does not know about it.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 9ce4c75..e19e46a 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -33,6 +33,7 @@
 #include <asm/qdio.h>
 #include <asm/debug.h>
 #include <asm/ebcdic.h>
+#include <asm/sysinfo.h>
 #include "zfcp_dbf.h"
 #include "zfcp_fsf.h"
 
@@ -515,6 +516,7 @@
 	struct fsf_qtcb_bottom_port *stats_reset_data;
 	unsigned long		stats_reset;
 	struct work_struct	scan_work;
+	struct service_level	service_level;
 	atomic_t		qdio_outb_full;	   /* queue full incidents */
 };