ASoC: Intel: bytcr_rt5651: Reporting button presses

Enable reporting of button presses now that the codec driver recently has
gotten support for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>