ALSA: ASoC: Add WM8580 CODEC driver

The WM8580 is an audio CODEC designed for DVD and surround sound
applications, offering three stereo DACs and a stereo ADC.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>