Start of migrating Icom rigs to separate LEVEL and PARM values to avoid collisions

https://github.com/Hamlib/Hamlib/issues/373

rigs/icom/ic756.c

@@ -542,7 +542,7 @@ const struct rig_caps ic756pro2_caps =
     RIG_MODEL(RIG_MODEL_IC756PROII),
     .model_name = "IC-756PROII",
     .mfg_name =  "Icom",
-    .version =  BACKEND_VER ".1",
+    .version =  BACKEND_VER ".0",
     .copyright =  "LGPL",
     .status =  RIG_STATUS_STABLE,
     .rig_type =  RIG_TYPE_TRANSCEIVER,

rigs/icom/icom.h

@@ -31,7 +31,7 @@
 #include <sys/time.h>
 #endif
 
-#define BACKEND_VER "20200910"
+#define BACKEND_VER "20200911"
 
 /*
  * defines used by comp_cal_str in rig.c
@@ -167,6 +167,8 @@ struct icom_priv_caps
     int agc_levels_present;     /* Flag to indicate that agc_levels array is populated */
     struct icom_agc_level agc_levels[RIG_AGC_LAST + 1]; /* Icom rig-specific AGC levels, the last entry should have level -1 */
     struct cmdparams *extcmds;  /* Pointer to extended operations array */
+    struct cmdparams *extlevels; /* Pointer to extended operations array */
+    struct cmdparams *extparms;  /* Pointer to extended operations array */
 };