5030 VNICs should support a variable MTU
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Rob Gulewich <robert.gulewich@joyent.com>
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Richard Lowe <richlowe@richlowe.net>