Revert "Predefined names: _PRP proposal changed to _DSD"

Reverting the patch while work on the proposed addition remains in flux.
OSL: Cleanup AcpiOsAllocateZeroed() stubs.

This patch implements AcpiOsAllocateZeroed() in generic OSL for
applications that have USE_NATIVE_ALLOCATED_ZEROED enabled.

Some utilities may only include osunixxf.c/oswinxf.c without including
utalloc.c. In such cases the default AcpiOsAllocateZeroed() implementation
is useful. Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
OSL: Cleanup AcpiOsGetThreadId()/AcpiOsExecute() stubs.

This patch cleans up the single threaded application stubs,
AcpiOsGetThreadId() and AcpiOsExecute(), by moving them to the OSL layer,
implemented when ACPI_SINGLE_THREADED is defined.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
OSL: Cleanup AcpiOsGetRootPointer() stubs.

This patch cleans up AcpiOsGetRootPointer() by deleting the
AeLocalGetRootPointer() and adding ACPI_USE_NATIVE_RSDP_POINTER.

The use of AeLocalGetRootPointer(), referenced by osunixxf.c/oswinxf.c,
prevents portable applications that do not have this function implemented
from being able to directly link the useful generic OSL.

This patch uses ACPI_USE_NATIVE_RSDP_POINTER to define whether
AcpiOsGetRootPointer() should be used as a stub. If a utility needs a specific
and functioning AcpiOsGetRootPointer(), it now should define
ACPI_USE_NATIVE_RSDP_POINTER and implement its own.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Utilities: Cleanup use of ACPI_DEBUGGER

The acpinames code defines ACPI_DEBUGGER in order to link
AcpiDbReadTableFromFile(). This patch splits the AcpiDbReadTableFromFile()
function from the debugger and implements it in a generic utilities API so that
acpinames no longer needs to link the debugger for this.

Because acpinames needs access to dump functions, ACPI_DEBUG_OUTPUT needs to be
defined and AcpiDbgLevel needs to be set to maintain consistent behavior.

This patch also cleans up ACPI_DEBUGGER for acpihelp.

This patch is required for removing anstubs.c. Without doing this first,
removing anstubs.c will lead to many link requirements to all debugger and
disassembler objects for acpinames.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>