NKRO is disable when SET_PROTOCOL(boot)

- Command can force to enable NKRO even when boot mode
- After boot keyboard may be in boot mode due to BIOS' request

protocol/pjrc/usb.c

@@ -930,6 +930,9 @@ ISR(USB_COM_vect)
 				}
 				if (bRequest == HID_SET_PROTOCOL) {
 					keyboard_protocol = wValue;
+#ifdef NKRO_ENABLE
+                                        keyboard_nkro = !!keyboard_protocol;
+#endif
                                         clear_keyboard();
 					//usb_wait_in_ready();
 					usb_send_in();