net/vlan: Fix mtu setting
net/vlan: Fix mtu setting

Fix minor shell typo that broke setting mtu on vlans.

X-Gentoo-Bug: 392971
X-Gentoo-Bug-URL: https://bugs.gentoo.org/392971
Signed-off-by: Robin H. Johnson <aa3b04a87f185a8b919ce94fe21b810489ffb8d4@gentoo.org>

OpenRC/openrc,dwfreed/openrc,williamh/openrc,OpenRC/openrc,williamh/openrc,dwfreed/openrc,OpenRC/openrc,dwfreed/openrc,williamh/openrc