ahci: Add Device ID for HighPoint RocketRaid 642L

commit d251836508fb26cd1a22b41381739835ee23728d upstream.

This device normally comes with a proprietary driver, using a web GUI
to configure RAID:
 http://www.highpoint-tech.com/USA_new/series_rr600-download.htm
But thankfully it also works out of the box with the AHCI driver,
being just a Marvell 88SE9235.

Devices 640L, 644L, 644LS should also be supported but not tested here.

Change-Id: Ia8989d0ecb664181e4627fb839bbd9d41344c53d
Signed-off-by: Jérôme Carretero <cJ-ko@zougloub.eu>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux 3.4.94

Change-Id: I932d30722066f8c10f24c6b143f629629a725537