[SCSI] zfcp: Rename sbal_last.

sbal_last is confusing, as it is not the last one actually used,
but just a limit. sbal_limit is a better name.

Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index adfbbb0..fdd5520 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -851,7 +851,7 @@
 	struct zfcp_adapter    *adapter;       /* adapter request belongs to */
 	u8		       sbal_number;    /* nr of SBALs free for use */
 	u8		       sbal_first;     /* first SBAL for this request */
-	u8		       sbal_last;      /* last possible SBAL for
+	u8		       sbal_limit;      /* last possible SBAL for
 						  this reuest */
 	u8		       sbal_curr;      /* current SBAL during creation
 						  of request */