media: xilinx: Mark as broken

This currently does not build in this tree due to incompatible changes to
the DMA driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
ASoC: adau1761: Fix input PGA volume

For the input PGA to work correctly the ALC clock needs to be active.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
ASoC: adau1761: Add PGA Slew time control

The PGA Slew Time control allows to configure the rate with which the PGA
gain control ramps up/down to the target setting.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
ASoC: adau1761: Add ALC controls

The adau1761 has a automatic level control block that can adjust the gain
for the differential input PGA. This patch adds ALSA controls for enabling
and changing the parameter settings for the ALC.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
ASoC: adau1761: Hardcode ZED board platform data

In the absence of devicetree support for the ADAU1761 hardcode the platform
data settings for the ZED board for now.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>