Fix get_powerstat call when get_powerstat is not defined

https://github.com/Hamlib/Hamlib/issues/1217

NEWS

@@ -25,6 +25,7 @@ Version 4.6
         * Fix FTDX3000 rig split
 
 Version 4.5.5
+        * Fix get_powerstat bad call in rigctl_parse.c
         * Really fix CM108 ptt_bitnum usage
         * Fix Elecraft power2mW precision/accuracy
         * Fix power on/off/on for Icom rigs with rigctld power_on=0

tests/rigctl_parse.c

@@ -1731,7 +1731,7 @@ readline_repeat:
 
     else
     {
-        if (my_rig->caps->set_powerstat && (rig_powerstat == RIG_POWER_OFF
+        if (my_rig->caps->get_powerstat && (rig_powerstat == RIG_POWER_OFF
                                             || rig_powerstat == RIG_POWER_STANDBY))
         {
             // Update power status