ASoC: sun8i-codec: Remove unused dev from codec struct

This field is not used anywhere in the driver, so remove it.

Fixes: 36c68493 ("ASoC: Add sun8i digital audio codec")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20200217064250.15516-5-samuel@sholland.org


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