MdeModulePkg/UefiPxeBcDxe: Refine the PXE boot displayed information

This path is to refine the PXE boot displayed information so as to
in line with NetworkPkg/UefiPxeBcDxe driver.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>

MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcSupport.h

@@ -1,6 +1,6 @@
 /** @file
   Support routines for PxeBc.
-Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -67,6 +67,20 @@ PxeBcConfigureUdpWriteInstance (
   IN     UINT8          Ttl,
   IN     UINT8          ToS
   );
+
+
+/**
+  This function is to display the IPv4 address.
+
+  @param[in]  Ip        The pointer to the IPv4 address.
+
+**/
+VOID
+PxeBcShowIp4Addr (
+  IN EFI_IPv4_ADDRESS   *Ip
+  );
+  
+
 /**
   Convert number to ASCII value.