cciss.4, hpsa.4: Mention cciss removal in Linux 4.13

cciss.4, hpsa.4: Mention cciss removal in Linux 4.13

During the Linux 4.13 development cycle, the cciss driver has been
removed in favor of the hpsa driver, which has been amended with
some legacy board support.

* man4/cciss.4 (.SH DESCRIPTION): Mention driver removal.
* man4/hpsa.4 (.SH DESCRIPTION): Mention list of boards that are
  recognised since Linux 4.13.

Signed-off-by: Eugene Syromyatnikov <evgsyr@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>