BaseTools/CommonLib: avoid using 'native' word size in IP address handling

BaseTools/CommonLib: avoid using 'native' word size in IP address handling

In the context of the BaseTools, there is no such thing as a native word
size, given that the same set of tools may be used to build a firmware
image consisting of both 32-bit and 64-bit modules.

So update StrToIpv4Address() and StrToIpv6Address() to use UINT64
types instead of UINTN types when parsing strings.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>