ASoC: Intel: cht_bsw_rt5672: 19.2MHz clock for Baytrail platforms

Lenovo platforms use RT5670 with Baytrail, add the required
MCLK control and configuration to 19.2MHz

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=96691


Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>