[U-Boot] [PATCH] dtbo: Fix dtbo generation rules

[Michal Simek]

Take the first prerequisite (dts overlay file) instead of standard
input.

Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

Not sure how this was designed to take overlay as input.
What I have done was simply add overlay to arch/arm/dts folder and add
target with .dtbo suffix.

---
 scripts/Makefile.lib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index a5b57fc6b98a..34b3fed6a0ba 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -317,7 +317,7 @@ quiet_cmd_dtco = DTCO    $@
 # No generation of assembly file either
 # Modified for U-Boot
 cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
-	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) - ; \
+	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
 	$(DTC) -@ -O dtb -o $@ -b 0 \
 		-i $(dir $<) $(DTC_FLAGS) \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
-- 
1.9.1