ASoC: jz4740-i2s: Support continuous sample rate

The I2S controller on JZ47xx SoCs doesn't impose restrictions on
sample rate and the driver doesn't make any assumptions about it,
so the DAI should advertise a continuous sample rate range.

Acked-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
Link: https://lore.kernel.org/r/20221023143328.160866-8-aidanmacdonald.0x0@gmail.com


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