disable Firefly Tx bit in ZynqmonTask (#218)

* disable Firefly Tx bit in ZynqmonTask
Putting it here ignores power state so it should be done differently.

projects/cm_mcu/ZynqMonTask.c

@@ -3,6 +3,10 @@
  *
  *  Created on: Jan 3, 2020
  *      Author: wittich
+ *
+ *  This task sends data to the Zynq for monitoring purposes.
+ *  It should not read out any data, but only send data that is
+ *  already available in the system.
  */
 // includes for types
 #include <stdint.h>
@@ -300,6 +304,8 @@ void zm_set_firefly_temps(struct zynqmon_data_t data[], int start)
 #ifdef REV2
 uint16_t getFFtXdisenablebit(const uint8_t i)
 {
+  return 56; // FIXME
+#ifdef NOTDEF
   if (i > NFIREFLIES_F1 + NFIREFLIES_F2) {
     log_warn(LOG_SERVICE, "caught %d > total fireflies %d\r\n", i, NFIREFLIES);
     return 56;
@@ -325,6 +331,7 @@ uint16_t getFFtXdisenablebit(const uint8_t i)
     return 56;
   else
     return val;
+#endif // NOTDEF
 }
 // updated once per loop.
 // For each firefly device, send