sony-laptop: restore the last user requested brightness level on resume.

Signed-off-by: NMattia Dongili <malattia@linux.it>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/misc/sony-laptop.c

@@ -942,6 +942,11 @@ static int sony_nc_resume(struct acpi_device *device)
 		}
 	}
 
+	/* set the last requested brightness level */
+	if (sony_backlight_device &&
+			!sony_backlight_update_status(sony_backlight_device))
+		printk(KERN_WARNING DRV_PFX "unable to restore brightness level");
+
 	/* re-initialize models with specific requirements */
 	dmi_check_system(sony_nc_ids);