sof-soundwire: rt1316 - DAC L and R is replaced by DAC

sof-soundwire: rt1316 - DAC L and R is replaced by DAC

In the latest codec driver rt1316-sdw.c, the DAC L and DAC R are
replaced by DAC, so we change the ucm to add the condition checking,
if 'DAC L' exists, will set those mixers in the old way, otherwise,
set the mixers with new name.

The codec rt1316 is used on a Dell TGL soundwire audio machine.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>