Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/include/linux/usb/midi.h b/include/linux/usb/midi.h
index 1d10408..c8c52e3 100644
--- a/include/linux/usb/midi.h
+++ b/include/linux/usb/midi.h
@@ -70,7 +70,7 @@
 	__u8  bJackID;
 	__u8  bNrInputPins;		/* p */
 	struct usb_midi_source_pin pins[]; /* [p] */
-	/*__u8  iJack;  -- ommitted due to variable-sized pins[] */
+	/*__u8  iJack;  -- omitted due to variable-sized pins[] */
 } __attribute__ ((packed));
 
 #define USB_DT_MIDI_OUT_SIZE(p)	(7 + 2 * (p))