staging: greybus: arche-platform: fix coldboot probe error path

staging: greybus: arche-platform: fix coldboot probe error path

Make sure to deregister the PM notifier in case the coldboot sequence
fails during probe.

Fixes: d29b67d44a7c ("greybus: arche-platform: Add support for init-off feature")
Reported-by: Haotian Zhang <vulab@iscas.ac.cn>
Link: https://lore.kernel.org/lkml/20251104090825.224-1-vulab@iscas.ac.cn/
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20251219105928.23329-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>