ktd202x: Turn on the ktd202x led module

This resolves an I2C bus mastering issue on Yorktown by claiming the device
using a driver written for it.

Change-Id: I67c8448b81182267753b99fee2f24b2768234c9a
diff --git a/debian/defconfig b/debian/defconfig
index 1b87a30..d717b2c 100644
--- a/debian/defconfig
+++ b/debian/defconfig
@@ -84,3 +84,4 @@
 CONFIG_SENSORS_GPIO_FAN=y
 CONFIG_PMBUS=y
 CONFIG_SENSORS_INA233=m
+CONFIG_LEDS_KTD202X=y