Sync patches r14686, r14687 and r14691 from main trunk.
1. Add TPM2 related header file.
2. Add TPM2 implementation.

git-svn-id: svn://svn.code.sf.net/p/edk2/code/branches/UDK2010.SR1/MdePkg@14693 6f19259b-4bc3-4df7-8a09-765794883524