Merge pull request #526 from adafruit/pcm5122

adding PCM51xx

Author: FoamyGuy

.gitmodules

@@ -1127,3 +1127,6 @@
 [submodule "libraries/drivers/spa06_003"]
 	path = libraries/drivers/spa06_003
 	url = https://github.com/adafruit/Adafruit_CircuitPython_SPA06_003.git
+[submodule "libraries/drivers/pcm51xx"]
+	path = libraries/drivers/pcm51xx
+	url = https://github.com/adafruit/Adafruit_CircuitPython_PCM51xx.git

docs/drivers.rst

@@ -584,6 +584,7 @@ Miscellaneous
     OV2640 Camera (adafruit_ov2640) <https://docs.circuitpython.org/projects/ov2640/en/latest/>
     OV5640 Camera (adafruit_ov5640) <https://docs.circuitpython.org/projects/ov5640/en/latest/>
     OV7670 Camera (adafruit_ov7670) <https://docs.circuitpython.org/projects/ov7670/en/latest/>
+    PCM51xx I2S DAC (adafruit_pcm51xx) <https://docs.circuitpython.org/projects/pcm51xx/en/latest/>
     Pixelbuf (adafruit_pixelbuf) <https://docs.circuitpython.org/projects/pixelbuf/en/latest/>
     RockBlock Iridium Satellite Modem (adafruit_rockblock) <https://docs.circuitpython.org/projects/rockblock/en/latest/>
     S-35710 Low-Power Wake Up Timer (adafruit_s35710) <https://docs.circuitpython.org/projects/s35710/en/latest/>