[POWERPC] fix up front-LED Kconfig

Rather long patch, apparently no one has updated the pmac32_defconfig in
a while.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/macintosh/via-pmu-led.c b/drivers/macintosh/via-pmu-led.c
index af8375e..5189d54 100644
--- a/drivers/macintosh/via-pmu-led.c
+++ b/drivers/macintosh/via-pmu-led.c
@@ -74,7 +74,7 @@
 
 static struct led_classdev pmu_led = {
 	.name = "pmu-front-led",
-#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK
+#ifdef CONFIG_ADB_PMU_LED_IDE
 	.default_trigger = "ide-disk",
 #endif
 	.brightness_set = pmu_led_set,