HID: amd_sfh: Change dev_err to dev_dbg for additional debug info

Users should only be notified at most one time on systems doesn't have
any sensors connected or non-supported systems.

Check the return code and don't display error messages in those
conditions.

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