Added PortalBase

Author: makermelissa

.gitmodules

@@ -754,3 +754,6 @@
 [submodule "libraries/helpers/fakerequests"]
 	path = libraries/helpers/fakerequests
 	url = https://github.com/adafruit/Adafruit_CircuitPython_FakeRequests.git
+[submodule "libraries/helpers/portalbase"]
+	path = libraries/helpers/portalbase
+	url = https://github.com/adafruit/Adafruit_CircuitPython_PortalBase.git

docs/drivers.rst

@@ -32,6 +32,7 @@ specific boards.
     Adafruit FeatherWings <https://circuitpython.readthedocs.io/projects/featherwing/en/latest/>
     MatrixPortal (Metro M4 Airlift + RGB Shield) <https://circuitpython.readthedocs.io/projects/matrixportal/en/latest/>
     Adafruit MagTag <https://circuitpython.readthedocs.io/projects/magtag/en/latest/>
+    Adafruit PortalBase <https://circuitpython.readthedocs.io/projects/portalbase/en/latest/>
     PyBadger (PyBadge and PyGamer) <https://circuitpython.readthedocs.io/projects/pybadger/en/latest/>
     Adafruit PyPortal <https://circuitpython.readthedocs.io/projects/pyportal/en/latest/>
     Adafruit MONSTER M4SK <https://circuitpython.readthedocs.io/projects/monsterm4sk/en/latest/>