Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index f3f693b..874e29d 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -240,7 +240,7 @@
 				       disc_resp, DISCOVER_RESP_SIZE);
 		if (res)
 			return res;
-		/* This is detecting a failure to transmit inital
+		/* This is detecting a failure to transmit initial
 		 * dev to host FIS as described in section G.5 of
 		 * sas-2 r 04b */
 		dr = &((struct smp_resp *)disc_resp)->disc;