backlight: lp855x: convert a type of device name

Configurable data, backlight device name is set to constant character type.
Signed-off-by: NMilo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/backlight/lp855x_bl.c

@@ -273,7 +273,7 @@ static int lp855x_backlight_register(struct lp855x *lp)
 	struct backlight_device *bl;
 	struct backlight_properties props;
 	struct lp855x_platform_data *pdata = lp->pdata;
-	char *name = pdata->name ? : DEFAULT_BL_NAME;
+	const char *name = pdata->name ? : DEFAULT_BL_NAME;
 
 	props.type = BACKLIGHT_PLATFORM;
 	props.max_brightness = MAX_BRIGHTNESS;

include/linux/platform_data/lp855x.h

@@ -128,7 +128,7 @@ struct lp855x_rom_data {
  * @rom_data : list of new eeprom/eprom registers
  */
 struct lp855x_platform_data {
-	char *name;
+	const char *name;
 	enum lp855x_brightness_ctrl_mode mode;
 	u8 device_control;
 	int initial_brightness;