Increase sound-dai-cells to 1 to allow using the DAIs in the codec
corresponding to AIF2 and AIF3.

The generic ASoC OF code supports a #sound-dai-cells value of 0 or 1
with no impact to the driver, so this is a backward-compatible change.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20210430035859.3487-2-samuel@sholland.orgSigned-off-by: Mark Brown <broonie@kernel.org>