MFC r271362:
Make ctl_port_mask an array to support more then 32 ports.

Overflow reported by Coverity.

CID:		1229894

Approved by:	re (marius)
MFC r271407: Extend UNMAP blacklist on all STEC SSD models.

None of existing STEC devices need UNMAP or even support it well,
having many limitations and even hanging sometimes executing those
commands. New devices that may use UNMAP going to be released under
HGST name.

Approved by:	re (delphij)