Staging: hv: rename struct NETVSC_DEVICE

The Linux kernel doesn't have all caps structures, we don't like to
shout at our programmers, it makes them grumpy.  Instead, we like to
sooth them with small, rounded letters, which puts them in a nice,
compliant mood, and makes them more productive and happier, allowing
them more fufilling lives overall.

Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>