ASoC: rt5645: Add platform-data for Lenovo Ideapad Mixx 320

The Lenovo Ideapad Mixx 320 has a digital mic connected to DMIC2
add a DMI based quirk pointing to the intel_braswell_platform_data
for devices with a mic on DMIC2.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>