Add SY command validation

remove FT991 from vfo adjustment

rigs/yaesu/newcat.c

@@ -8218,7 +8218,6 @@ int newcat_set_tx_vfo(RIG *rig, vfo_t tx_vfo)
             newcat_is_rig(rig, RIG_MODEL_FT2000) ||
             newcat_is_rig(rig, RIG_MODEL_FTDX5000) ||
             newcat_is_rig(rig, RIG_MODEL_FTDX1200) ||
-            newcat_is_rig(rig, RIG_MODEL_FT991) ||
             newcat_is_rig(rig, RIG_MODEL_FTDX10) ||
             newcat_is_rig(rig, RIG_MODEL_FTDX3000))
     {
@@ -11293,6 +11292,10 @@ int newcat_set_cmd_validate(RIG *rig)
     {
         strcpy(valcmd, "");
     }
+    else if (strncmp(priv->cmd_str, "SY", 2) == 0)
+    {
+        strcpy(valcmd, "SY;");
+    }
     else
     {
         rig_debug(RIG_DEBUG_TRACE, "%s: %s not implemented\n", __func__, priv->cmd_str);