Use Mde library and definition instead of some native definitions in NetLib, to simply network library.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4693 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Network/PxeBcDxe/Pxe_bc_mtftp.c

@@ -1127,11 +1127,7 @@ MtftpDownload (
     // test of MTFTP server to make sure it handles mulitple opens correctly.
     // This code should NOT be enabled normally.
     //
-#ifdef SpecialNowaitVersion
-#pragma message ("This is special version for MTFTP regression test")
-    if (StartBlock || !LastBlock)
-#endif
-      if (((Status = MtftpListen (
+    if (((Status = MtftpListen (
                       Private,
                       &BufferSize,
                       BufferPtrLocal,
@@ -1148,7 +1144,7 @@ MtftpDownload (
         //
         // failed
         //
-      }
+    }
     //
     // if none were received, start block is not reset
     //