Fix ZMQ typo

lib/src/phy/rf/rf_zmq_imp_trx.h

@@ -55,7 +55,7 @@ typedef struct {
   pthread_mutex_t mutex;
   cf_t*           zeros;
   void*           temp_buffer_convert;
-  uint32_t        frequency_hz_mhz;
+  uint32_t        frequency_mhz;
 } rf_zmq_tx_t;
 
 typedef struct {

lib/src/phy/rf/rf_zmq_imp_tx.c

@@ -52,7 +52,7 @@ int rf_zmq_tx_open(rf_zmq_tx_t* q, rf_zmq_opts_t opts, void* zmq_ctx, char* sock
     }
     q->socket_type   = opts.socket_type;
     q->sample_format = opts.sample_format;
-    q->frequency_hz_mhz = opts.frequency_mhz;
+    q->frequency_mhz = opts.frequency_mhz;
 
     rf_zmq_info(q->id, "Binding transmitter: %s\n", sock_args);
 
@@ -216,7 +216,7 @@ bool rf_zmq_tx_match_freq(rf_zmq_tx_t* q, uint32_t freq_hz)
 {
   bool ret = false;
   if (q) {
-    ret = (q->frequency_hz_mhz == 0 || q->frequency_hz_mhz == freq_hz);
+    ret = (q->frequency_mhz == 0 || q->frequency_mhz == freq_hz);
   }
   return ret;
 }