2) Rename BufToHexString to BufInReverseOrderToHexString
3) Rename HexStringToBuf to HexStringToBufInReverseOrder
4) Update function comments in HiiLib.h and IfrSupportLib.h.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5989 6f19259b-4bc3-4df7-8a09-765794883524