leds: leds-asic3: make LEDS_ASIC3 depend on LEDS_CLASS

We call led_classdev_unregister/led_classdev_register in asic3_led_remove/asic3_led_probe, thus make LEDS_ASIC3 depend on LEDS_CLASS.

This patch fixes below build error if LEDS_CLASS is not configured.

LD .tmp_vmlinux1
drivers/built-in.o: In function `asic3_led_remove':
clkdev.c:(.devexit.text+0x1860): undefined reference to led_classdev_unregister' drivers/built-in.o: In function asic3_led_probe':
clkdev.c:(.devinit.text+0xcee8): undefined reference to `led_classdev_register'
make: *** [.tmp_vmlinux1] Error 1

---
 drivers/leds/Kconfig |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

index 4a40561..cb8562a 100644
@@ -381,6 +381,7 @@ config LEDS_NETXBIG
 
 config LEDS_ASIC3
 	bool "LED support for the HTC ASIC3"
+	depends on LEDS_CLASS
 	depends on MFD_ASIC3
 	default y
 	help

1.7.1