gatt_le_data_ind() function

* Function gatt_le_data_ind * Description This function is called when data is received from L2CAP. * if we are the originator of the connection, we are the ATT * client, and the received message is queued up for the client. * If we are the destination of the connection, we are the ATT * server, so the message is passed to the server processing * function. * Returns void