samples: wifi: twt: Replace arrays to function calls

There are some changes in wifi.h header file, which
converts static arrays to functions. Replacing the arrays
to function calls.

Signed-off-by: Kapil Bhatt <kapil.bhatt@nordicsemi.no>

samples/wifi/twt/src/main.c

@@ -115,8 +115,8 @@ static int teardown_twt(void)
  ret = net_mgmt(NET_REQUEST_WIFI_TWT, iface, &params, sizeof(params));
  if (ret) {
  LOG_ERR("%s with %s failed, reason : %s",
- wifi_twt_operation2str[params.operation],
- wifi_twt_negotiation_type2str[params.negotiation_type],
+ wifi_twt_operation_txt(params.operation),
+ wifi_twt_negotiation_type_txt(params.negotiation_type),
  wifi_twt_get_err_code_str(params.fail_reason));
  return ret;
  }
@@ -221,7 +221,7 @@ static void print_twt_params(uint8_t dialog_token, uint8_t flow_id,
  LOG_INF("TWT flow ID: %d",
  flow_id);
  LOG_INF("TWT negotiation type: %s",
- wifi_twt_negotiation_type2str[negotiation_type]);
+ wifi_twt_negotiation_type_txt(negotiation_type));
  LOG_INF("TWT responder: %s",
  responder ? "true" : "false");
  LOG_INF("TWT implicit: %s",
@@ -251,7 +251,7 @@ static void handle_wifi_twt_event(struct net_mgmt_event_callback *cb)
  if (resp->resp_status == WIFI_TWT_RESP_RECEIVED) {
  twt_resp_received = 1;
  LOG_INF("TWT response: %s",
- wifi_twt_setup_cmd2str[resp->setup_cmd]);
+ wifi_twt_setup_cmd_txt(resp->setup_cmd));
  LOG_INF("== TWT negotiated parameters ==");
  print_twt_params(resp->dialog_token,
  resp->flow_id,