Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 355759b..ec07e62 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -266,7 +266,7 @@
  * audio-interface quirks
  *
  * returns zero if no standard audio/MIDI parsing is needed.
- * returns a postive value if standard audio/midi interfaces are parsed
+ * returns a positive value if standard audio/midi interfaces are parsed
  * after this.
  * returns a negative value at error.
  */