ACPICA: Debugger: drop ACPI_NONSTRING attribute from name_seg

ACPICA commit 4623b3369f3aa1ec5229d461e91c514510a96912

Partially revert commit 70662db7 ("ACPICA: Apply ACPI_NONSTRING in
more places") as I've yet again incorrectly applied the ACPI_NONSTRING
attribute where it is not needed.

A warning was initially reported by Collin Funk [1], and further review
by Jiri Slaby [2] highlighted another issue related to the same commit.

Drop the ACPI_NONSTRING attribute to fix the issue.

Fixes: 70662db7 ("ACPICA: Apply ACPI_NONSTRING in more places")
Link: https://lore.kernel.org/all/87ecvpcypw.fsf@gmail.com [1]
Link: https://lore.kernel.org/all/5c210121-c9b8-4458-b1ad-0da24732ac72@kernel.org [2]
Link: https://github.com/acpica/acpica/commit/4623b336


Reported-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ahmed Salem <x0rw3ll@gmail.com>
Cc: 6.16+ <stable@vger.kernel.org> # 6.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>