From: Andrew Morton <akpm@osdl.org>

Provide a module parameter to override the default 30-second-per-device SATA
probing timeout.

Cc: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>