ASoC: Intel: sof-rt5682: correct naming for dmic16k

Change the link name to be "dmic16k", the cpu_dai_name to be "DMIC16k
Pin", to be aligned with other machine drivers.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Bard liao <yung-chuan.liao@linux.intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>