12252 remove sunfire-specific code from kstat(1m)

Review Request #2503 — Created Jan. 29, 2020 and submitted — Latest diff uploaded

As part of IPD 5, support for sunfire (EXX00) will be removed. This will be split up to ease implementation and review.

This particular issue is to remove the sunfire code from the kstat CLI and the perl Kstat module, to avoid build failures when the sunfire code itself (and its associated headers) is removed.

The result of this would only affect anybody running kstat(1m) on a sunfire.

Build clean. Tested the kstat cli and a perl script, both of which still function as expected.