ASoC: Intel: Skylake: Do not check dev_type for dmic link type

Some BIOS have inconsistent dev_type value for DMIC link type.
Since there is only one device type for DMIC link type, remove device
type check if link type is NHLT_LINK_DMIC.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>