add ADAU1361 & ADAU1761
This adds the ADAU1361 and ADAU1761 audio codecs from Analog Devices. They are pin compatible, the ADAU1761 includes a DSP core. It could be argued that it should be placed in DSP_Analog
. I did not do this to share the symbol, could duplicate it and move if requested.
Some pins have secondary functions, these are entered as alternate pin definitions.
Footprint can be found in kicad-footprints!2931 (merged)
Edited by Hendrik v. Raven