In preparation of bringing ArmSoftFloatLib up to date in order to provide some missing routines, import the Berkely SoftFloat library into the tree as a git submodule. Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1845 Acked-by: Jian J Wang <jian.j.wang@intel.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>