Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

drivers/net/can/softing/softing.h

@@ -22,7 +22,7 @@ struct softing_priv {
 	struct softing *card;
 	struct {
 		int pending;
-		/* variables wich hold the circular buffer */
+		/* variables which hold the circular buffer */
 		int echo_put;
 		int echo_get;
 	} tx;