UBUNTU: [Config] Add pm80xx scsi driver to d-i

This will add debian installer support for the Adaptec PMC-Sierra SAS
HBA controller.

BugLink: http://bugs.launchpad.net/bugs/1595628



Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>