move comment next to its associated #if

Author: jepler

ports/mimxrt10xx/common-hal/audiobusio/I2SOut.h

@@ -26,14 +26,13 @@
 
 #pragma once
 
+// Some boards don't implement I2SOut, so suppress any routines from here.
 #if CIRCUITPY_AUDIOBUSIO_I2SOUT
 #include "supervisor/background_callback.h"
 #include "common-hal/microcontroller/Pin.h"
 
 #include "common-hal/audiobusio/__init__.h"
 
-// Some boards don't implement I2SOut, so suppress any routines from here.
-
 typedef struct {
     mp_obj_base_t base;
     i2s_t i2s;