NetworkPkg: Move network related header files from MdeModulePkg to NetworkPkg

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2196

Cc: Siyuan Fu <siyuan.fu@intel.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Siyuan Fu <siyuan.fu@intel.com>

NetworkPkg/Include/Guid/VlanConfigHii.h

@@ -0,0 +1,19 @@
+/** @file
+  GUIDs used as HII FormSet and HII Package list GUID in VlanConfig driver.
+
+Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __VLAN_CONFIG_HII_GUID_H__
+#define __VLAN_CONFIG_HII_GUID_H__
+
+#define VLAN_CONFIG_FORM_SET_GUID \
+  { \
+    0xd79df6b0, 0xef44, 0x43bd, {0x97, 0x97, 0x43, 0xe9, 0x3b, 0xcf, 0x5f, 0xa8 } \
+  }
+
+extern EFI_GUID gVlanConfigFormSetGuid;
+
+#endif