Makefile: Fix dependency for u-boot-with-dtb.bin

Makefile uses binman to produce u-boot-with-dtb.bin target. As its input it
takes DTB file and u-boot binary without DTB, which is stored in file
u-boot-nodtb.bin. So fix target dependency.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
diff --git a/Makefile b/Makefile
index 65aca6e..0d3d80e 100644
--- a/Makefile
+++ b/Makefile
@@ -1604,7 +1604,7 @@
 endif
 
 ifeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
-u-boot-with-dtb.bin: u-boot.bin u-boot.dtb \
+u-boot-with-dtb.bin: u-boot-nodtb.bin u-boot.dtb \
 	$(if $(CONFIG_MPC85XX_HAVE_RESET_VECTOR), u-boot-br.bin) FORCE
 	$(call if_changed,binman)