HID: make 3M PCT touchscreen driver standalone config option

The point behind 'default !EMBEDDED' for certain HID drivers that simple and
straightforward quirks for HID devices (which are implemented as drivers on
HID bus) wouldn't have to be enabled separately, if the device is otherwise
more-or-less HID standard compliant.

But this driver is rather standalone driver, so we'd want to have it normally
selectable.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>