drivers/adau7002: Add driver for handling ADAU7002

drivers/adau7002: Add driver for handling ADAU7002

The ADAU7002 is a family of Stereo PDM-to-I2S/TDM conversion ICs from
Analog Devices.  On some boards they are a used to convert a PDM audio
data stream from a DMIC to an I2S signal.

Add a driver for populating ACPI table entries for this part.

BUG=b:72121803
TEST=With grunt audio kernel patches, "aplay -l" shows playback devices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: acpd7219m98357 [acpd7219m98357], device 0: Playback da7219-hifi-0 []
   Subdevices: 1/1
   Subdevice #0: subdevice #0
 card 0: acpd7219m98357 [acpd7219m98357], device 2: HiFi Playback HiFi-2 []
   Subdevices: 1/1
   Subdevice #0: subdevice #0

Change-Id: I2b64c8e1cbc0a68984482a7d496f8c4498cb6cbe
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-on: https://review.coreboot.org/23659
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: Martin Roth <martinroth@google.com>