Diagnosis related functions and callbacks

Overview

Functions
uint32_t	EC_API_SLV_DIAG_enable (EC_API_SLV_SHandle_t *pHandle)
	Enable history diagnosis object.
uint32_t	EC_API_SLV_DIAG_newMessage (EC_API_SLV_SHandle_t *pHandle, uint32_t diagCode, uint8_t type, uint16_t textID, uint8_t numParams, EC_API_SLV_SDIAG_parameter_t *pParams)
	Send Diagnosis message.