[components][net] 更新 Kconfig 和 SConscript，支持 LWIP210

Signed-off-by: MurphyZhao <d2014zjt@163.com>

components/net/Kconfig

@@ -68,9 +68,12 @@ config RT_USING_LWIP
 
             config RT_USING_LWIP202
                 bool "lwIP v2.0.2"
+
+            config RT_USING_LWIP210
+                bool "lwIP v2.1.0"
         endchoice
 
-        if RT_USING_LWIP202
+        if (RT_USING_LWIP210)
             config RT_USING_LWIP_IPV6
                 bool "IPV6 protocol"
                 default n

components/net/SConscript

@@ -8,7 +8,7 @@ cwd = GetCurrentDir()
 list = os.listdir(cwd)
 
 # the default version of LWIP is 2.0.2
-if not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202'):
+if not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202') and not GetDepend('RT_USING_LWIP210'):
     AddDepend('RT_USING_LWIP202')
 
 for d in list: