Add stack/rfcomm/rfc_int::rfcomm_mx_state_text

/*

 * Define states and events for the RFC multiplexer state machine

*/

#define RFC_MX_STATE_IDLE 0

#define RFC_MX_STATE_WAIT_CONN_CNF 1

#define RFC_MX_STATE_CONFIGURE 2

#define RFC_MX_STATE_SABME_WAIT_UA 3

#define RFC_MX_STATE_WAIT_SABME 4

#define RFC_MX_STATE_CONNECTED 5

#define RFC_MX_STATE_DISC_WAIT_UA 6

typedef enum : uint16_t {

  RFC_MX_STATE_IDLE = 0,

  RFC_MX_STATE_WAIT_CONN_CNF = 1,

  RFC_MX_STATE_CONFIGURE = 2,

  RFC_MX_STATE_SABME_WAIT_UA = 3,

  RFC_MX_STATE_WAIT_SABME = 4,

  RFC_MX_STATE_CONNECTED = 5,

  RFC_MX_STATE_DISC_WAIT_UA = 6,

} tRFC_MX_STATE;

inline std::string rfcomm_mx_state_text(tRFC_MX_STATE state) {

  switch (state) {

    case RFC_MX_STATE_IDLE:

      return std::string("idle");

    case RFC_MX_STATE_WAIT_CONN_CNF:

      return std::string("wait_config");

    case RFC_MX_STATE_CONFIGURE:

      return std::string("configure");

    case RFC_MX_STATE_SABME_WAIT_UA:

      return std::string("sabme_wait_ua");

    case RFC_MX_STATE_WAIT_SABME:

      return std::string("wait_sabme");

    case RFC_MX_STATE_CONNECTED:

      return std::string("connected");

    case RFC_MX_STATE_DISC_WAIT_UA:

      return std::string("disconnect_wait_ua");

    default:

      return std::string("UNKNOWN");

  }

}

/*

 * Define port states