Add high level methods to iterate over all 'reg' properties of all DT nodes whose device_type properties have the value "memory". Since we are modifying the FdtClient protocol, update the protocol and the only existing implementation at the same time. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Laszlo Ersek <lersek@redhat.com>