[finsh] 添加 RT_Device_Class_Bus 对应的描述字符串

components/finsh/cmd.c

@@ -832,6 +832,7 @@ static char *const device_type_str[RT_Device_Class_Unknown] =
     "DAC Device",
     "WDT Device",
     "PWM Device",
+    "Bus Device",
 };
 
 long list_device(void)