arm: mvebu: Drop reference to CONFIG_ARMADA_39X

This is not defined anywhere. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index 28d3e5e..a9f506c 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -38,7 +38,7 @@
 ifneq ($(CONFIG_ARMADA_XP),)
 	KWB_REPLACE += CPU
 	KWB_CFG_CPU = SHEEVA
-else ifneq ($(CONFIG_ARMADA_375)$(CONFIG_ARMADA_38X)$(CONFIG_ARMADA_39X),)
+else ifneq ($(CONFIG_ARMADA_375)$(CONFIG_ARMADA_38X),)
 	KWB_REPLACE += CPU
 	KWB_CFG_CPU = A9
 endif