ASoC: fsl: fsl_rpmsg: Register CPU DAI with name of rpmsg channel

Each rpmsg sound card sits on one rpmsg channel. Register CPU DAI with
name of rpmsg channel so that ASoC machine driver can easily link CPU
DAI with rpmsg channel name.

Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
Link: https://msgid.link/r/20240311111349.723256-5-chancel.liu@nxp.com


Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>