ACPI: save NVS memory for Lenovo G50-45

In commit 821d6f03 (ACPI / sleep: Do not save NVS for new machines to
accelerate S3), to optimize S3 suspend/resume speed, code is introduced
to ignore NVS memory saving during S3 for all the platforms later than
2012.

But, Lenovo G50-45, a platform released in 2015, still needs NVS memory
saving during S3. A quirk is introduced for this platform.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=189431


Tested-by: Przemek <soprwa@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
[ rjw: Drop unnecessary code ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>