tree-wide: fix typos "couter" -> "counter"

This patch was generated by

	git grep -E -i -l 'couter' | xargs -r perl -p -i -e 's/couter/counter/'

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

sound/synth/emux/soundfont.c

@@ -374,7 +374,7 @@ sf_zone_new(struct snd_sf_list *sflist, struct snd_soundfont *sf)
 
 
 /*
- * increment sample couter
+ * increment sample counter
  */
 static void
 set_sample_counter(struct snd_sf_list *sflist, struct snd_soundfont *sf,