[S390] drivers/s390/: Spelling fixes

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index 5b7385e..c02f960 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -2620,7 +2620,7 @@
  * DASD_3990_ERP_ACTION
  *
  * DESCRIPTION
- *   controll routine for 3990 erp actions.
+ *   control routine for 3990 erp actions.
  *   Has to be called with the queue lock (namely the s390_irq_lock) acquired.
  *
  * PARAMETER