chore: silence GNSS application logs by default

ql-application/threadx/interface/custom_app/mqtt.c

@@ -9,6 +9,7 @@
 #include "ql_application.h"
 #include "sockets.h"
 #include "app_inc.h"
+#include "app_gnss_log.h"
 #include "cjson.h"
 #include "ql_fs.h"
 #include "ql_fota.h"
@@ -442,7 +443,7 @@ int parse_command(const char *json_str, command_t *cmd)
     if (params != NULL) {
         switch (cmd->type) {
 			case MSG_GPS_QUERY:
-				printf("MSG_GPS_QUERY\r\n");
+				APP_GNSS_LOG("MSG_GPS_QUERY\r\n");
 		       /*返回当前的GPS坐标信息*/
 				break;