ASoC: dt-bindings: Add bindings for WCD9335 DAIs

Add bindings for the DAIs available in WCD9335 to avoid
having to use unclear number indices in device trees.

Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220622161322.168017-2-y.oudjana@protonmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>