acer-wmi/hp-wmi: use platform_device_unregister instead of platform_device_del in module_exit

platform_device_unregister will also call platform_device_put() to drop reference count.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
2 files changed