Add PNP info to PCI attachments of ciss driver

Move the module declaration so that it's after the device table.
The PNP_INFO must come after the module declaration.

Reviewed by: imp, chuck
Submitted by: Lakhan Shiva Kamireddy <lakhanshiva@gmail.com>
Sponsored by: Google, Inc. (GSoC 2018)
Differential Revision: https://reviews.freebsd.org/D15995