Promote ft840 to stable

yaesu/ft840.c

@@ -220,7 +220,7 @@ const struct rig_caps ft840_caps =
     .mfg_name =           "Yaesu",
     .version =            "0.1",
     .copyright =          "LGPL",
-    .status =             RIG_STATUS_UNTESTED,
+    .status =             RIG_STATUS_STABLE,
     .rig_type =           RIG_TYPE_TRANSCEIVER,
     .ptt_type =           RIG_PTT_RIG,
     .dcd_type =           RIG_DCD_NONE,