mpc83xx: add missing kernelnames into Makefile

add missing kernelnames to Makefile because those files are needed in 'target/linux/mpc83xx/image/Makefile'. Without them a compilation for mpc83xx is not possible - the buildbot stops with the error "No such file or directory"

Signed-off-by: Claudio Thomas <[email protected]>

SVN-Revision: 41330

target/linux/mpc83xx/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2010 OpenWrt.org
+# Copyright (C) 2007-2014 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -23,6 +23,6 @@ define Target/Description
 	Build firmware images for Freescale MPC83xx based boards (eg. RouterBoard 600).
 endef
 
-KERNELNAME:="uImage"
+KERNELNAME:="uImage dtbImage.rb600 dtbImage.rb333"
 
 $(eval $(call BuildTarget))