2) Add MdePkg/Include/IndustryStandard/SmBus.h which hosts the standard definition defined in System Management Bus Spefication V2.0. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2266 6f19259b-4bc3-4df7-8a09-765794883524