HHKB BT sends invalid keycode when NKRO mode

[tmk]

RN-42 doesn't support NKRO on Bluetooth.
LUFA protocol supports NKRO while RN-42 protocol doesn't. HHKB BT has both USB and BT protocols, swtiching to BT when NKRO mode is problem.

This is API issue?
common/host.h:

extern bool keyboard_nkro;
void host_keyboard_send(report_keyboard_t *report);

• It should be different two interfaces for 6KRO and NKRO.
  void host_keyboard_send(report_keyboard_t *report);
  void host_keyboard_nkro_send(report_keyboard_nkro_t *report);
• How to know if protocol supports NKRO
• How to switch between NKRO and 6KRO

[tmk]

Blutooth controller can send 6KRO/NKRO report in USB mode and only 6KRO in BT mode.
No problem with current implementation.