[Patch 3/6] MdeModulePkg/UefiPxeBcDxe: Add the clarification compared to UefiPxeBcDxe in NetworkPkg.

[Jiaxin Wu <Jiaxin.wu@intel.com>]

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1205

This patch is to add the driver usage/difference clarification
compared to UefiPxeBcDxe in NetworkPkg.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
---
 .../Universal/Network/UefiPxeBcDxe/UefiPxeBcDxe.inf   | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/UefiPxeBcDxe.inf b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/UefiPxeBcDxe.inf
index b5b9e80710..0fef0058bd 100644
--- a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/UefiPxeBcDxe.inf
+++ b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/UefiPxeBcDxe.inf
@@ -2,11 +2,20 @@
 #  This module produces EFI Preboot Execution Environment (PXE) Base Code Protocol.
 #
 #  This module produces EFI PXE Base Code Protocol upon EFI MMP Protocl and IPv4
 #  network stack, used to control PXE-compatible devices. It produces EFI Load File
 #  Protocol to provide one clean way to otain control from the boot manager if the
-#  boot patch is from the remote device.
+#  boot patch is from the remote device. This driver only supports IPv4 network stack.
+#
+#  Notes: 
+#  1) This driver can't co-work with the UefiPxeBcDxe driver in NetworkPkg. 
+#  2) This driver might have some issues that have been fixed in the UefiPxeBcDxe 
+#     driver in NetworkPkg. 
+#  3) This driver supports less feature than the UefiPxeBcDxe driver in NetworkPkg 
+#     (e.g. IPv6, MTFTP windowsize).
+#  4) UefiPxeBcDxe driver in NetworkPkg is recommanded to use instead of this one even 
+#     both of them can be used.
 #
 #  Copyright (c) 2007 - 2018, 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
-- 
2.17.1.windows.2