Typos: change aditional to additional.

The below patch fixes some typos "aditional" to "additional", and also fixes
a comment with another word mispelled.

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index a7a5733..51e3ed4 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -1643,7 +1643,7 @@
 	pinctl = (!spec->hp_present && spec->cur_eapd) ? PIN_OUT : 0;
 	snd_hda_codec_write(codec, 0x1a, 0, AC_VERB_SET_PIN_WIDGET_CONTROL,
 			    pinctl);
-	/* on ideapad there is an aditional speaker (subwoofer) to mute */
+	/* on ideapad there is an additional speaker (subwoofer) to mute */
 	if (spec->ideapad)
 		snd_hda_codec_write(codec, 0x1b, 0,
 				    AC_VERB_SET_PIN_WIDGET_CONTROL,