YH8xx,YH9xx: Keymap improvement

The main "innovation" in this patch are two "virtual buttons"
for the record switch on YH92x targets. When the switch state
changes, a single BUTTON_REC_SW_ON or .._OFF button event will
be generated. Thus keymap code can react on switching, but
not on the actual state of the switch.

Wherever sensible, the following user scheme is applied:
- use PLAY as confirm button
- use REW button or Long REW to exit
- use REC (YH820) or FFWD (YH92X) as modifier key for button combos

Change-Id: Ic8d1db9cc6869daed8dda98990dfdf7f6fd5d5a1

apps/plugins/pacbox/pacbox.c

@@ -390,6 +390,9 @@ static int gameProc( void )
         if ((status & PACMAN_MENU) == PACMAN_MENU
 #ifdef PACMAN_RC_MENU
             || status == PACMAN_RC_MENU
+#endif
+#ifdef PACMAN_MENU2
+            || status == PACMAN_MENU2
 #endif
         ) {
             bool menu_res;