docs/library/machine: Remove conditional docs for wake_reason function.
And instead list its availability explicitly.
@@ -74,12 +74,12 @@ Power related functions
to know that we are coming from `machine.DEEPSLEEP`. For wake up to actually happen,
wake sources should be configured first, like `Pin` change or `RTC` timeout.
-.. only:: port_wipy
-
.. function:: wake_reason()
Get the wake reason. See :ref:`constants <machine_constants>` for the possible return values.
+ Availability: ESP32, WiPy.
+
Miscellaneous functions
-----------------------
