qlnxe: Unconditionally enable extended media types

Those extended media types are available since about 2015 [1]. All
supported branches already have them defined.

No functional change intended.

[1] eb7e25b22f1c ifmedia changes: Extend the number of available subtypes for Ethernet media ...

Reviewed by: kbowling
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D52374

(cherry picked from commit 08356a733eb7a7bef1afe20ded2d983b55310de7)