HID: amd_sfh: Move bus declaration outside of amd-sfh

This should allow external drivers to reference this bus ID
reservation and detect data coming from amd-sfh.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>