调整SAL依赖项

components/net/Kconfig

@@ -41,7 +41,8 @@ config RT_USING_SAL
         config SAL_USING_POSIX
             bool "Enable BSD socket operated by file system API"
             default n
-            select RT_LIBC_USING_FILEIO
+            select RT_USING_LIBC
+            select RT_USING_POSIX
             select RT_USING_POSIX_SELECT
             help
                 Let BSD socket operated by file system API, such as read/write and involveed in select/poll POSIX APIs.