ASoC: Intel: Skylake: Select proper format for NHLT blob

Use actual pipeline format, not PCM format for blob selection. Otherwise
selected blobs are not correct in pipelines with format conversion
e.g.: SRC module.

Signed-off-by: Piotr Maziarz <piotrx.maziarz@linux.intel.com>
Signed-off-by: Lewandowski, Gustaw <gustaw.lewandowski@linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Tested-by: Lukasz Majczak <lma@semihalf.com>
Link: https://lore.kernel.org/r/20210818075742.1515155-4-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>