asoc: Update supported rate and format for dummy dai

Add support for 384KHz sample rate and S24_3LE
bitwidth for dummy dai.

Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>
Link: https://lore.kernel.org/r/1593265030-1451-1-git-send-email-rohitkr@codeaurora.org


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