ACPI: video: Add force_vendor quirk for Sony Vaio PCG-FRV35

The Sony Vaio PCG-FRV35 advertises both native and vendor backlight
control interfaces. With the upcoming changes to prefer native over
vendor acpi_video_get_backlight_type() will start returning native on
these laptops.

But the native radeon_bl0 interface does not work, where as the sony
vendor interface does work. Add a quirk to force use of the vendor
interface.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/video_detect.c

@@ -239,6 +239,19 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		},
 	},
 
+	/*
+	 * Models which should use the vendor backlight interface,
+	 * because of broken native backlight control.
+	 */
+	{
+	 .callback = video_detect_force_vendor,
+	 /* Sony Vaio PCG-FRV35 */
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"),
+		},
+	},
+
 	/*
 	 * Toshiba models with Transflective display, these need to use
 	 * the toshiba_acpi vendor driver for proper Transflective handling.