Add new feature bits for the net device
Since the new feature bits are >= 32, add support for reading higher
than 32bit feature words from the virtio mmio interface.
Ran everything through scripts/codestyle.space, which uses astyle
to generally follow K&R style.
Biggest non whitespace change is pulling brackets down on function
declarations, which I'm pretty ambivalent about, but astyle insists
on taking a stance
