[component][net][at] at_client增加deInit接口

Author: Ryan-CW-Code

components/net/at/include/at.h

@@ -169,21 +169,18 @@ struct at_client
     /* The maximum supported receive data length */
     rt_size_t recv_bufsz;
 
-#if (!defined(RT_USING_SERIAL_V2))
-    rt_sem_t rx_notice;
-#endif
-
-    rt_mutex_t lock;
+    struct rt_event event;
+    struct rt_mutex lock;
 
     at_response_t resp;
-    rt_sem_t resp_notice;
     at_resp_status_t resp_status;
 
     struct at_urc_table *urc_table;
     rt_size_t urc_table_size;
     const struct at_urc *urc;
 
     rt_thread_t parser;
+    rt_slist_t  list;
 };
 typedef struct at_client *at_client_t;
 #endif /* AT_USING_CLIENT */
@@ -207,6 +204,7 @@ int at_req_parse_args(const char *req_args, const char *req_expr, ...);
 
 /* AT client initialize and start*/
 int at_client_init(const char *dev_name, rt_size_t recv_bufsz, rt_size_t send_bufsz);
+int at_client_deInit(const char *dev_name);
 
 /* ========================== multiple AT client function ============================ */