Ignore set_split for Yaesu 60M exception rigs

Cannot do split in memory modey

rigs/yaesu/newcat.c

@@ -2730,6 +2730,11 @@ int newcat_set_split_vfo(RIG *rig, vfo_t vfo, split_t split, vfo_t tx_vfo)
     {
         RETURNFUNC(err);
     }
+    if (newcat_60m_exception(rig, rig->state.cache.freqMainA, rig->state.cache.modeMainA))
+    {
+        rig_debug(RIG_DEBUG_VERBOSE, "%s: ignoring set_split since we're on 60M exception\n", __func__);
+        return RIG_OK; // fake the return code to make things happy
+    }
 
     if (is_ft991)
     {