Add TPA2016 to bundle.

Author: kattni

.gitmodules

@@ -415,3 +415,6 @@
 [submodule "libraries/helpers/adafruitio"]
 	path = libraries/helpers/adafruitio
 	url = https://github.com/adafruit/Adafruit_CircuitPython_AdafruitIO.git
+[submodule "libraries/drivers/tpa2016"]
+	path = libraries/drivers/tpa2016
+	url = https://github.com/adafruit/Adafruit_CircuitPython_TPA2016.git

docs/drivers.rst

@@ -249,6 +249,7 @@ Miscellaneous
     STMPE610 Resistive Touchscreen <https://circuitpython.readthedocs.io/projects/stmpe610/en/latest/>
     Thermal Printer <https://circuitpython.readthedocs.io/projects/thermal_printer/en/latest/>
     Touchscreen 4-Wire Resistive <https://circuitpython.readthedocs.io/projects/touchscreen/en/latest/>
+    TPA2016 Audio Amplifier with AGC <https://circuitpython.readthedocs.io/projects/tpa2016/en/latest/>
     Trellis 4x4 Keypad <https://circuitpython.readthedocs.io/projects/trellis/en/latest/>
     VC0706 TTL Camera <https://circuitpython.readthedocs.io/projects/vc0706/en/latest/>
     VS1053 Audio Codec <https://circuitpython.readthedocs.io/projects/vs1053/en/latest/>