device modules space indentation

[bartmichu]

Hello Gordon,
It's not a big issue at all but I've noticed some style inconsistencies in the device modules i.e. usually it is two spaces for indents, but sometimes it's only one space, and then sometimes it's a mix of them in the same file.
Do you mind if I go through these files and fix it so that it's always two spaces? (in accordance to Espruino/CONTRIBUTING)

[gfwilliams]

That'd be great, thanks! I'll try and make sure I keep to two in the future.