[PATCH] MdePkg: Add comments for SMBIOS Type 3 structure to cover SKU Number

[Chris Phillips <chrisp@hpe.com>]

Starting with SMBIOS spec version 2.7, Type 3 added SKU Number.
SKU Number is at a variable offset (depends on count and length of Contained Elements), so cannot add SKU Number to the SMBIOS_TABLE_TYPE3 structure.
Adding comments to explain how to get SKU Number.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chris Phillips <chrisp@hpe.com>
---
 MdePkg/Include/IndustryStandard/SmBios.h | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/MdePkg/Include/IndustryStandard/SmBios.h b/MdePkg/Include/IndustryStandard/SmBios.h
index c66422fc3a..a24713d214 100644
--- a/MdePkg/Include/IndustryStandard/SmBios.h
+++ b/MdePkg/Include/IndustryStandard/SmBios.h
@@ -2,7 +2,7 @@
   Industry Standard Definitions of SMBIOS Table Specification v3.0.0.
 
 Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
-(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
+(C) Copyright 2015-2017 Hewlett Packard Enterprise Development LP<BR>
 This program and the accompanying materials are licensed and made available under 
 the terms and conditions of the BSD License that accompanies this distribution.  
 The full text of the license may be found at
@@ -467,7 +467,18 @@ typedef struct {
   UINT8                       NumberofPowerCords;
   UINT8                       ContainedElementCount;
   UINT8                       ContainedElementRecordLength;
+  //
+  // Can have 0 to (ContainedElementCount * ContainedElementRecordLength) contained elements
+  //
   CONTAINED_ELEMENT           ContainedElements[1];
+  //
+  // Add for smbios 2.7
+  //
+  // Since ContainedElements has a variable number of entries, must not define SKUNumber in
+  // the structure.  Need to reference it by starting at offset 0x15 and adding
+  // (ContainedElementCount * ContainedElementRecordLength) bytes.
+  //
+  // SMBIOS_TABLE_STRING         SKUNumber;
 } SMBIOS_TABLE_TYPE3;
 
 ///
-- 
2.11.0.windows.1