ASoC: fsl: Restore configuration of platform

This reverts commit 33683cbf ("ASoC: fsl: remove unnecessary
dai_link->platform").

dai_link->platform is needed. The platform component is
"snd_dmaengine_pcm", which is registered from cpu driver,

If dai_link->platform is not assigned, then platform
component will not be probed, then there will be issue:

aplay: main:831: audio open error: Invalid argument

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1681900158-17428-1-git-send-email-shengjiu.wang@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>