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.

MFC after:	3 days

(cherry picked from commit a3e07f1c6ab759432e67fc2c454166c54f5a825c)