mfd: 88pm860x: Use REG resource for backlight

Now resource of 88pm860x backlight is changed from IORESOURCE_IO
to IORESOURCE_REG. In original driver, the resource is using
self-defined IORESOURCE_IO. So change the resource to register
offset to match the definition of IORESOURCE_REG.

Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

include/linux/mfd/88pm860x.h

@@ -34,12 +34,6 @@ enum {
 	PM8606_ID_MAX,
 };
 
-enum {
-	PM8606_BACKLIGHT1 = 0,
-	PM8606_BACKLIGHT2,
-	PM8606_BACKLIGHT3,
-};
-
 enum {
 	PM8606_LED1_RED = 0,
 	PM8606_LED1_GREEN,
@@ -340,10 +334,8 @@ enum {
 };
 
 struct pm860x_backlight_pdata {
-	int		id;
 	int		pwm;
 	int		iset;
-	unsigned long	flags;
 };
 
 struct pm860x_led_pdata {