Fix rigs so that VFOB/A split works as well as VFOA/B

https://github.com/Hamlib/Hamlib/issues/745

rigs/kenwood/kenwood.c

@@ -962,13 +962,6 @@ int kenwood_open(RIG *rig)
 
             rig->state.rigport.retry = retry_save;
 
-            // Default to 1st VFO and split off -- but only 1 time
-            if (rig->caps->set_vfo && priv->opened == 0)
-            {
-                rig_set_vfo(rig, vfo_fixup(rig, RIG_VFO_A, 0));
-                priv->opened = 1;
-            }
-
             RETURNFUNC(RIG_OK);
         }
 

rigs/kenwood/kenwood.h

@@ -28,7 +28,7 @@
 #include "token.h"
 #include "misc.h"
 
-#define BACKEND_VER "20210911"
+#define BACKEND_VER "20211008"
 
 #define EOM_KEN ';'
 #define EOM_TH '\r'

src/misc.c

@@ -1768,7 +1768,7 @@ vfo_t HAMLIB_API vfo_fixup(RIG *rig, vfo_t vfo, split_t split)
 
         int satmode = rig->state.cache.satmode;
 
-        if (split && vfo == RIG_VFO_TX) { vfo = RIG_VFO_B; }
+        if (split && vfo == RIG_VFO_TX) { vfo = rig->state.tx_vfo; }
 
         if (VFO_HAS_MAIN_SUB_ONLY && !split && !satmode && vfo != RIG_VFO_B) { vfo = RIG_VFO_MAIN; }