This is a breaking change due to the signature change of `enable_irq()`.
Previously the signature was:
machine.enable_irq()
Now the signature matches other ports, and the docs, and is:
machine.enable_irq(state)
Where `state` is the return value from `machine.disable_irq()`.
Signed-off-by: Damien George <damien@micropython.org>
a1ee42cd3e