freebsdkmod.load → kmoad.load

Summary: freebsdkmod.load isn't available anymore on Salt 2017.7.4.

Test Plan: Tested both on Ysul and a FreeBSD laptop with a fresh FreeBSD 11 installation.

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D1417