if_re: Add PNP info for module

Add PNP info so it the module can be by devmatch(8) and automatically
loaded. On non-x86 platforms it is not included in GENERIC.

Reviewed by: imp
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D52557

(cherry picked from commit e13b5298ec87be03da2231bc7b44a6a4b976b850)