sysutils/cpufetch: Fix build on i386

Cherry pick patch to add i{345}86 to the list or supported architectures.

https://lists.freebsd.org/archives/freebsd-ports/2022-April/001700.html

Reported by: jbo_at_insane.engineer (maintainer)
Fixes: 4a1d3b62ff7ef2691d47e0848512d11acf5fab44