leds: leds-lp5523: modify the way of setting led device name

Currently all leds channels begins with string lp5523. Patch adds a
possibility to provide name via platform data. This makes it possible to
have several chips without overlapping sysfs names.

Signed-off-by: Samu Onkalo <[e-mail]>
Cc: Arun Murthy <[e-mail]>
Cc: Ilkka Koskinen <[e-mail]>
Cc: Richard Purdie <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/leds/leds-lp5523.c

···
 			return -EINVAL;
 		}
 
-		snprintf(name, 32, "lp5523:channel%d", chan);
+		snprintf(name, sizeof(name), "%s:channel%d",
+			pdata->label ?: "lp5523", chan);
 
 		led->cdev.name = name;
 		led->cdev.brightness_set = lp5523_set_brightness;

include/linux/leds-lp5523.h

···
 	int	(*setup_resources)(void);
 	void	(*release_resources)(void);
 	void	(*enable)(bool state);
+	const	char *label;
 };
 
 #endif /* __LINUX_LP5523_H */