ACPI / PM: Add Sony VGN-FW21E to nonvs blacklist.

As noted by a user in https://bugzilla.redhat.com/show_bug.cgi?id=641789


The Sony VGN-FW21E also needs the nonvs by default workaround added.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>