HID: amd_sfh: Add support for shutdown operation

As soon as the system is booted after shutdown, the sensors may remain in
a weird state and fail to initialize. Therefore, all sensors should be
turned off during shutdown.

Fixes: 4f567b9f

 ("SFH: PCIe driver to add support of AMD sensor fusion hub")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>