Adds support for Planck Rev 6 (#2666)

* initial files for rev 6 with encoder

* music map init, dip scan added

* adds ws2812 driver for arm

* flesh out dip and encoder support

* adds default encoder res

* adds default encoder res

* start muse implementation

* muse working with encoder as control

* flip direction

* try mouse wheel again

* dont break other revs

* dont break other revs

* conditional autio

* pwm ws driver (not working)

* update build includes for chibios

* update ws2812 driver/config

* last commit for glasser code

* working example

* remove rgb for now

* finish up rev6

* working encoder keycodes

* add warnings to planck keymaps about the LAYOUT

1 files changed, 3 insertions, 1 deletions

diff --git a/quantum/process_keycode/process_audio.h b/quantum/process_keycode/process_audio.h
index 7ac15b733..3a84c3d86 100644
--- a/quantum/process_keycode/process_audio.h
+++ b/quantum/process_keycode/process_audio.h
@@ -1,6 +1,8 @@
 #ifndef PROCESS_AUDIO_H
 #define PROCESS_AUDIO_H
 
+float compute_freq_for_midi_note(uint8_t note);
+
 bool process_audio(uint16_t keycode, keyrecord_t *record);
 void process_audio_noteon(uint8_t note);
 void process_audio_noteoff(uint8_t note);
@@ -8,4 +10,4 @@ void process_audio_all_notes_off(void);
 
 void audio_on_user(void);
 
-#endif
\ No newline at end of file
+#endif