rf_zmq: increase param len to capture longer rf args

lib/src/phy/rf/rf_zmq_imp.h

@@ -26,7 +26,7 @@
 #include "srslte/phy/rf/rf.h"
 
 #define DEVNAME_ZMQ "ZeroMQ"
-#define PARAM_LEN (128)
+#define PARAM_LEN (256)
 #define PARAM_LEN_SHORT (PARAM_LEN / 2)
 
 SRSLTE_API int rf_zmq_open(char* args, void** handler);