[finsh] add FINSH_ENABLE_ECHO macro to config the finsh needs echo or not

components/finsh/Kconfig

@@ -26,6 +26,10 @@ config FINSH_USING_DESCRIPTION
     bool "Keeping description in symbol table"
     default y
 
+config FINSH_ENABLE_ECHO
+    int "Enble the command echo mode"
+    default 1
+    
 config FINSH_THREAD_PRIORITY
     int "The priority level value of finsh thread"
     default 20

components/finsh/shell.c

@@ -414,7 +414,7 @@ void finsh_thread_entry(void *parameter)
     char ch;
 
     /* normal is echo mode */
-    shell->echo_mode = 1;
+    shell->echo_mode = FINSH_ENABLE_ECHO;
 
 #ifndef FINSH_USING_MSH_ONLY
     finsh_init(&shell->parser);