[SAL][Kconfig]使用网络检测才依赖workqueue

components/net/sal/Kconfig

@@ -1,13 +1,13 @@
 menuconfig RT_USING_SAL
     bool "SAL: socket abstraction layer"
     select RT_USING_NETDEV
-    select RT_USING_SYSTEM_WORKQUEUE
     default n
 
 if RT_USING_SAL
 
     config SAL_INTERNET_CHECK
         bool "Enable the ability that check internet status"
+        select RT_USING_SYSTEM_WORKQUEUE
         default y
         help
             The ability that check internet status is provided by RT-Thread.

components/net/sal/src/sal_socket.c

@@ -27,7 +27,7 @@
 #endif
 
 /* check system workqueue stack size */
-#if RT_SYSTEM_WORKQUEUE_STACKSIZE < 1536
+#ifdef SAL_INTERNET_CHECK && #if RT_SYSTEM_WORKQUEUE_STACKSIZE < 1536
 #error "The system workqueue stack size must more than 1536 bytes"
 #endif