DynamicTablesPkg: AML resource data parser

DynamicTablesPkg: AML resource data parser

Resource data are defined in the ACPI 6.3 specification,
s6.4 "Resource Data Types for ACPI". They can be created
using the ASL ResourceTemplate () statement, cf s19.3.3
"ASL Resource Templates".

Resource data can be of the small or large type and are
defined by their encoding. The resource data is stored
in the Bytelist of a BufferOp node. The Bytelist of a
BufferOp node is represented by an AML Data node in
the AML tree.

The resource data parser, examines the Bytelist (Data
node buffer) to detect the presence of resource data.
If the Bytelist data matches the encoding for resource
data types, the resource data parser fragments the
Bytelist containing the resource data buffer into
resource data elements represented as individual Data
nodes and stores them in the variable arguments list
of the BufferOp object nodes.

Example: ASL code and the corresponding AML tree
         representation for the resource data.

ASL Code
--------
Name (_CRS, ResourceTemplate() {
  QWordMemory (...)
  Interrupt (...)
}

AML Tree
--------
(NameOp)
  \
   |-[_CRS]-[BufferOp]                    # Fixed Arguments
   |-{NULL}   \                           # Variable Argument
               \                            list
               |-[BuffSize]               # Fixed Arguments
               |-{(Rd1)->(Rd2)->(EndTag)} # Variable Argument
                                            list
 Where:
 Rd1     - QWordMemory resource data element.
 Rd2     - Interrupt resource data element.
 EndTag  - Resource data end tag.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Alexei Fedorov <Alexei.Fedorov@arm.com>