gma500: backlight warning

The current bl code checks for backlight types and warns if they are not
properly set. Set ours to avoid the warning spew

(This one alone is probably 2.6.39 candidate)
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/gma500/psb_bl.c

@@ -194,6 +194,7 @@ int psb_backlight_init(struct drm_device *dev)
 	struct backlight_properties props;
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.max_brightness = 100;
+	props.type = BACKLIGHT_PLATFORM;
 
 	psb_backlight_device = backlight_device_register("psb-bl", NULL,
 						(void *)dev, &psb_ops, &props);