ASoC: mediatek: update MT2701 AFE documentation to adapt mfd device

As the new MFD parent is in place, modify MT2701 AFE documentation to
adapt it. Also add three core clocks in example.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
1 file changed