ASoC: fsl_sai: Make res a member of struct fsl_sai

The resource info need to be accessed by hw_params()
function for multi fifo case, the start address may
be not the FIFO0. So move it to be a member of
struct fsl_sai.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1655451877-16382-6-git-send-email-shengjiu.wang@nxp.com


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