backlight: Pass device through notify callback in the pwm driver

Add the device to the notify callback's arguments in the PWM backlight 
driver. This brings the notify callback into line with the other 
callbacks defined by this driver.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Simtec Linux Team <linux@simtec.co.uk>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
index 7a9754c..01b3d75 100644
--- a/include/linux/pwm_backlight.h
+++ b/include/linux/pwm_backlight.h
@@ -10,7 +10,7 @@
 	unsigned int dft_brightness;
 	unsigned int pwm_period_ns;
 	int (*init)(struct device *dev);
-	int (*notify)(int brightness);
+	int (*notify)(struct device *dev, int brightness);
 	void (*exit)(struct device *dev);
 };