arm64-subsetreg-32

arm64-subsetreg-32

This patch is based on the commit detailed below with paths adjusted
to match the Debian fpc package --plugwash
commit 3683d8b018c6acbce468e8db6478328e38b87fcf
Author: Jonas Maebe <jonas.maebe@elis.ugent.be>
Date:   Sun Dec 9 14:46:52 2018 +0000

      * when optimising subsetreg moves for aarch64, take into account the fact
        that the subsetreg itself can be 32 or 64 bit (mantis #33607)

    git-svn-id: https://svn.freepascal.org/svn/fpc/trunk@40512 3ad0048d-3df7-0310-abae-a5850022a9f2

Gbp-Pq: Name arm64-subsetreg-32.patch