vlynq: fix typo in Kconfig to enable debugging

Fix a typo in the VLYNQ bus driver Kconfig which prevented to turn on
VLYNQ bus debugging.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/vlynq/Kconfig

@@ -13,7 +13,7 @@ config VLYNQ
 
 config VLYNQ_DEBUG
 	bool "VLYNQ bus debug"
-	depends on VLYNQ && KERNEL_DEBUG
+	depends on VLYNQ && DEBUG_KERNEL
 	help
 	  Turn on VLYNQ bus debugging.