Update the Intel ixl/ixlv drivers to fix a panic in the boot/install
kernel if the system has a fiber-based Intel XL710 adapter installed.

In addition ixl version 1.2.8 and ixlv version 1.1.18 give:
  - Improved VF stability (thanks to Ryan Stone for this)
  - RSS fixes
  - link detection in the ixlv driver
  - new sysctl's added
  - corrected media reporting

Submitted by: jfv
Approved by: re