ACPI / video: correct DMI tag for Dell Inspiron 7520

ACPI / video: correct DMI tag for Dell Inspiron 7520

commit 5ff365fb6aed4c7ee5aae7b0239ce0b514aefabc upstream.

The DMI tag used to identify Dell Inspiron 7520 should be product name
instead of product version.

Fixes: 0e9f81d3b7cd (ACPI / video: Add systems that should favour native backlight interface)
Reported-and-tested-by: Téo Mazars <teomazars@gmail.com>
References: https://bugzilla.redhat.com/show_bug.cgi?id=909552
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>