Fixing MIDI for ARM without NKRO enabled (#9466)

tmk_core/protocol/midi/qmk_midi.h

@@ -2,6 +2,7 @@
 
 #ifdef MIDI_ENABLE
 #    include "midi.h"
+#    include <LUFA/Drivers/USB/USB.h>
 extern MidiDevice midi_device;
 void              setup_midi(void);
 void              send_midi_packet(MIDI_EventPacket_t* event);