conf/ucm: chtrt5645: At config for the Lenovo Ideapad Miix 320

conf/ucm: chtrt5645: At config for the Lenovo Ideapad Miix 320

The Lenovo Ideapad Miix 320 uses a digital mic connected to the DMIC2 input
(unlike the Asus T100HA which has it connected to the DMIC1 input), add a
long-name config specific for the Miix 320, which is a copy of the standard
chtrt5645 config with the internal analog mic section replaced with one
for a digital mic connected to the DMIC2 input.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>