ACPICA: Namespace: simplify creation of the initial/default namespace

ACPICA commit 76658f55d8cc498a763bdb92f8e0d934822a129c

For the objects that are created by default (_GPE, _SB_, etc)
there is no need to use the heavyweight ns_lookup function.
Instead, simply create each object and link it in as the namespace
is built.

Link: https://github.com/acpica/acpica/commit/76658f55


Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>