ACPICA: iASL: Add suppport for AGDI table

ACPICA commit cf36a6d658ca5aa8c329c2edfc3322c095ffd844

Add support for Arm Generic Diagnostic Dump and Reset Interface, which is
described by "ACPI for Arm Components 1.1 Platform Design Document"
ARM DEN0093.

Add the necessary types in the ACPICA header files and support for
compiling and decompiling the table.

Link: https://github.com/acpica/acpica/commit/cf36a6d6
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>