ppc4xx: Complete PMC440 board support

This patch brings the PMC440 board configuration file.
Finally it enables the PMC440 board support.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
diff --git a/Makefile b/Makefile
index 87d0a77..34e9f9d 100644
--- a/Makefile
+++ b/Makefile
@@ -1286,6 +1286,9 @@
 PMC405_config:	unconfig
 	@$(MKCONFIG) $(@:_config=) ppc ppc4xx pmc405 esd
 
+PMC440_config:	unconfig
+	@$(MKCONFIG) $(@:_config=) ppc ppc4xx pmc440 esd
+
 PPChameleonEVB_config		\
 PPChameleonEVB_BA_25_config	\
 PPChameleonEVB_ME_25_config	\