NetworkPkg: Move Network library header file from MdeModulePkg to NetworkPkg

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

NetworkPkg/Include/Library/DpcLib.h

@@ -0,0 +1,53 @@
+/** @file
+  DpcLib.h.
+
+Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _DPC_LIB_H_
+#define _DPC_LIB_H_
+
+#include <Protocol/Dpc.h>
+
+/**
+  Add a Deferred Procedure Call to the end of the DPC queue.
+
+  @param[in]  DpcTpl        The EFI_TPL that the DPC should invoke.
+  @param[in]  DpcProcedure  The pointer to the DPC's function.
+  @param[in]  DpcContext    The pointer to the DPC's context.  Passed to DpcProcedure
+                            when DpcProcedure is invoked.
+
+  @retval EFI_SUCCESS            The DPC was queued.
+  @retval EFI_INVALID_PARAMETER  DpcTpl is not a valid EFI_TPL.
+  @retval EFI_INVALID_PARAMETER  DpcProcedure is NULL.
+  @retval EFI_OUT_OF_RESOURCES   There are not enough resources available to
+                                 add the DPC to the queue.
+
+**/
+EFI_STATUS
+EFIAPI
+QueueDpc (
+  IN EFI_TPL            DpcTpl,
+  IN EFI_DPC_PROCEDURE  DpcProcedure,
+  IN VOID               *DpcContext    OPTIONAL
+  );
+
+/**
+  Dispatch the queue of DPCs. All DPCs that have been queued with a DpcTpl
+  value greater than or equal to the current TPL are invoked in the order that
+  they were queued.  DPCs with higher DpcTpl values are invoked before DPCs with
+  lower DpcTpl values.
+
+  @retval EFI_SUCCESS    One or more DPCs were invoked.
+  @retval EFI_NOT_FOUND  No DPCs were invoked.
+
+**/
+EFI_STATUS
+EFIAPI
+DispatchDpc (
+  VOID
+  );
+
+#endif