atheros i2s 512fs support

From: Mori Hiroki <yamori813_at_yahoo.co.jp>
Date: Mon, 05 Sep 2022 10:21:30 UTC
Hi

I thing better support Atheros sound asic more than raspai.
Because of no support on SPDIF on raspai. 

Linux code only support 256fs. I don't think atheros support 512fs.

Do you know how to support 512fs on I2S on atheros?

I want use FN1241 DAC that is only support 384fs and 512fs.

Regards

Hiroki Mori