Now the audio bindings have their own binding document update the main
MFD document to point to that file and remove the audio binding
documentation.
Signed-off-by: NCharles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMark Brown <broonie@kernel.org>