HID: amd_sfh: Modify and log error only if case of functionality failures

Modify log messages, but only log errors when sensors are missing or a
true failure occurs to avoid misleading "failed" messages.

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