Fix FT857 unnecessary vfo check in ft857_set_split_freq_mode

https://github.com/Hamlib/Hamlib/issues/636

rigs/yaesu/ft857.c

@@ -155,7 +155,7 @@ const struct rig_caps ft857_caps =
     RIG_MODEL(RIG_MODEL_FT857),
     .model_name =     "FT-857",
     .mfg_name =       "Yaesu",
-    .version =        "20210221.0",
+    .version =        "20210329.0",
     .copyright =      "LGPL",
     .status =         RIG_STATUS_STABLE,
     .rig_type =       RIG_TYPE_TRANSCEIVER,
@@ -1021,13 +1021,6 @@ int ft857_set_split_vfo(RIG *rig, vfo_t vfo, split_t split, vfo_t tx_vfo)
 
     rig_debug(RIG_DEBUG_VERBOSE, "%s: called \n", __func__);
 
-    if (vfo != RIG_VFO_CURR)
-    {
-        return -RIG_ENTARGET;
-    }
-
-    rig_debug(RIG_DEBUG_VERBOSE, "%s: called\n", __func__);
-
     switch (split)
     {
     case RIG_SPLIT_ON: