tree-wide: fix misspelling of "definition" in comments

"Definition" is misspelled "defintion" in several comments; this
patch fixes them. No code changes.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/scsi/dmx3191d.c b/drivers/scsi/dmx3191d.c
index fa738ec..207352c 100644
--- a/drivers/scsi/dmx3191d.c
+++ b/drivers/scsi/dmx3191d.c
@@ -31,7 +31,7 @@
 #include <scsi/scsi_host.h>
 
 /*
- * Defintions for the generic 5380 driver.
+ * Definitions for the generic 5380 driver.
  */
 #define AUTOSENSE