doc: dts: Add device tree information regarding wm8940 codec

This commit provides documentation entry for wm8940 codec.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220509121313.31216-1-lukma@denx.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lukasz Majewski 2022-05-09 14:13:13 +02:00 • committed by Mark Brown
commit 29e87c4f62
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