Revert "ia64: correct macro use in gas testsuite"

This reverts commit 2231ac9b9e88191178001d0ae5845e292acb2a56.

commit 6ae8a30d44f016cafb46a75843b5109316eb1996
Author: Jan Beulich <jbeulich@suse.com>
Date:   Fri Aug 9 11:59:31 2024 +0200

    gas: have scrubber retain more whitespace

has been reverted to fix PR gas/32073.