FRU and LIBTOPO support are illumos only features that will not be ported to
Linux and make the code more complicated than necessary. This commit
makes way for further cleanups of the zed/FMA code.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: David Quigley <david.quigley@intel.com>
Closes#6641