ASoC: sun8i-codec: Fix AIF widget channel references

Both the left and right side widgets referenced channel 0. This would
unnecessarily power on the right side widget (and its associated path)
when a mono stream was active.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20201001021148.15852-7-samuel@sholland.org


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