MinPlatformPkg: Support TCO base locked by FSP

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1457



Per security recommendation TCO Base should be
initialized and locked by FSP and MinPlatform should
support both TCO Base locked and not locked scenarios.

Cc: Michael Kubacki <michael.a.kubacki@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Michael Kubacki <michael.a.kubacki@intel.com>