/** @brief Unbind Request from RLC to MAC to unbind the interface SAPs
* @param pst Pointer to the post structure.
* @param spId SAP ID of the service provider.
* @param reason Reason for unbind request.
* @return ROK/RFAILED
*/
/** @brief Unbind Request from RLC to MAC to unbind the interface SAPs
* @param pst Pointer to the post structure.
* @param spId SAP ID of the service provider.
* @param reason Reason for unbind request.
* @return ROK/RFAILED
*/