ASoC: fsl-asoc-card: force cast the asrc_format type

ASoC: fsl-asoc-card: force cast the asrc_format type

Fix sparse warning:
sound/soc/fsl/fsl-asoc-card.c:833:45: sparse: warning: incorrect type in argument 3 (different base types)
sound/soc/fsl/fsl-asoc-card.c:833:45: sparse:    expected unsigned int [usertype] *out_value
sound/soc/fsl/fsl-asoc-card.c:833:45: sparse:    got restricted snd_pcm_format_t *

Fixes: b6e84d8c94de ("ASoC: fsl-asoc-card: Support new property fsl, asrc-format")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1658399393-28777-4-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>