ASoC: Intel: Fix BYTCR machine driver MODULE_ALIAS

snd_soc_sst_bytcr_dpcm_rt5640 doesn't autoload because MODULE_ALIAS doesn't
match with "bytt100_rt5640" platform device.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Cc: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>