sony_acpi: Video sysfs support take 2

add dev argument for backlight_device_register

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/sony_acpi.c b/drivers/acpi/sony_acpi.c
index fd7d55a..195895c 100644
--- a/drivers/acpi/sony_acpi.c
+++ b/drivers/acpi/sony_acpi.c
@@ -322,7 +322,7 @@
 
 	if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle, "GBRT", &handle))) {
 		sony_backlight_device = backlight_device_register("sony", NULL,
-					&sony_backlight_properties);
+					NULL, &sony_backlight_properties);
 	        if (IS_ERR(sony_backlight_device)) {
         	        printk(LOG_PFX "unable to register backlight device\n");
 		}