Add 5 second sleep during power on for IC7300

https://github.com/Hamlib/Hamlib/issues/1220

rigs/icom/icom.c

@@ -8051,6 +8051,11 @@ int icom_set_powerstat(RIG *rig, powerstat_t status)
 
     if (status == RIG_POWER_ON)   // wait for wakeup only
     {
+        if (rig->caps->rig_model == RIG_MODEL_IC7300)
+        {
+            rig_debug(RIG_DEBUG_VERBOSE, "%s: waiting 5 seconds for rig to wake up\n", __func__);
+            sleep(5);  // IC7300 is slow to start up -- may need to add more rigs
+        }
         for (i = 0; i < retry; ++i)   // up to 10 attempts
         {
             freq_t freq;

rigs/icom/icom.h

@@ -31,7 +31,7 @@
 #include <sys/time.h>
 #endif
 
-#define BACKEND_VER "20230118"
+#define BACKEND_VER "20230121"
 
 #define ICOM_IS_ID31 rig_is_model(rig, RIG_MODEL_ID31)
 #define ICOM_IS_ID51 rig_is_model(rig, RIG_MODEL_ID51)