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/advansys.c b/drivers/scsi/advansys.c
index b756041..22626ab 100644
--- a/drivers/scsi/advansys.c
+++ b/drivers/scsi/advansys.c
@@ -7969,7 +7969,7 @@
 		ASC_DBG(1, "before AscInitAsc1000Driver()\n");
 		status = AscInitAsc1000Driver(asc_dvc);
 
-		/* Refer to ASC_IERR_* defintions for meaning of 'err_code'. */
+		/* Refer to ASC_IERR_* definitions for meaning of 'err_code'. */
 		if (asc_dvc->err_code) {
 			scmd_printk(KERN_INFO, scp, "SCSI bus reset error: "
 				    "0x%x\n", asc_dvc->err_code);