fix typos concerning "first"

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/net/gianfar.c

@@ -904,7 +904,7 @@ static void gfar_init_filer_table(struct gfar_private *priv)
 	rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP);
 	rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP);
 
-	/* cur_filer_idx indicated the fisrt non-masked rule */
+	/* cur_filer_idx indicated the first non-masked rule */
 	priv->cur_filer_idx = rqfar;
 
 	/* Rest are masked rules */