MdePkg/Acpi62: Add type 7 NFIT Platform Capabilities Structure support

MdePkg/Acpi62: Add type 7 NFIT Platform Capabilities Structure support

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3915

This commit adds a definition type 7 Platform Capabilities Structure
and the struct definition for NFIT Table Structure Types.
The type has been added since ACPI Specification Version 6.2A.

Signed-off-by: Miki Shindo <miki.shindo@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>