ARM: head.S: axxia: Fix Rebase Error

commit f516cfd184888b71597fc3af83f5fe9db8227828 from
https://github.com/axxia/linux-yocto.git v5.10/standard/axxia-dev/base.

In a previous commit,
  "ARM: head.S: axxia: Set the NS bit since memory is non-secure"
  commit 5619f89f



the wrong register was updated.

Signed-off-by: John Jacques <john.jacques@intel.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>