HID: hid-goodix: drop unsupported and undocumented DT part

Drop support for Devicetree from, because the binding is being reverted
(on basis of duplicating existing binding) and property was not added to
the original binding.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>