parisc: Allow to reboot machine after system halt

stable inclusion
from stable-v5.10.181
commit c570dbf279a8d97bf8b60efcb860e664aa0ed072
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8GJZJ

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c570dbf279a8d97bf8b60efcb860e664aa0ed072



--------------------------------

commit 2028315c upstream.

In case a machine can't power-off itself on system shutdown,
allow the user to reboot it by pressing the RETURN key.

Cc: <stable@vger.kernel.org> # v4.14+
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>