Fix current TPM device string missing. Use efivarstore instead of varstor, remove...

Fix current TPM device string missing. Use efivarstore instead of varstor, remove TPM disable.

Signed-off-by: Jiewen Yao <Jiewen.yao@intel.com>
Reviewed-by: Guo Dong <Guo.Dong@intel.com>
Reviewed-by: Liming Gao <Liming.Gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15360 6f19259b-4bc3-4df7-8a09-765794883524