SecurityPkg/Tcg2Smm: Measure the table before patch.

SecurityPkg/Tcg2Smm: Measure the table before patch.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1940

According to TCG PFP specification: the ACPI table must be
measured prior to any modification, and the measurement
must be same cross every boot cycle.

There is a fix 3a63c17ebc853cbb27d190729d01e27f68e65b94
for the HID data. However that is not enough.
The LAML/LASA and PCD configuration change may also cause
similar problem.

We need measure the table before any update.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Signed-off-by: Jiewen Yao <Jiewen.Yao@intel.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>