Proof of concept for building a linux kernel module in pure rust.

• Getting the current state of the LEDs (can't be bothered to figure this one out, the reference code at milesp20's repository seems to stray quite far from Inte's documentation)

Ecosystem is not mature enough yet for a pure Rust kernel module other than experimentation, perhaps a partially Rust / partially C module may be better suited for writing kernel modules. Such as rust.ko