ASoC: rt5663: Add documentation for power supply support

rt5663 codec driver will support setting CPVDD and AVDD power supply
from device tree.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cheng-Yi Chiang 2018-11-16 10:12:43 +08:00 • committed by Mark Brown
commit 276aa6d38e
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