1. Add DPC protocol and DpcLib library in MdeModulePkg.

2. Add DpcDxe module and DxeDpcLib module in MdeModulePkg
3. Port network stack module to use DPC.
4. Use MIN, and MAX defined in MdePkg to replace NET_MIN and NET_MAX.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4307 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Input.c

@@ -607,6 +607,12 @@ Ip4AccpetFrame (
 
   Packet = NULL;
 
+  //
+  // Dispatch the DPCs queued by the NotifyFunction of the rx token's events
+  // which are signaled with received data.
+  //
+  NetLibDispatchDpc ();
+
 RESTART:
   Ip4ReceiveFrame (IpSb->DefaultInterface, NULL, Ip4AccpetFrame, IpSb);