kbuild: make arch-dtbs target PHONY
Without this, the arch-dtbs target only gets evaluated when building
U-Boot the first time, not when re-building (incrementally building)
U-Boot. Thus incremental builds ignore changes to DTB files.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/dts/Makefile b/dts/Makefile
index a7a6043..4970223 100644
--- a/dts/Makefile
+++ b/dts/Makefile
@@ -40,6 +40,7 @@
echo >&2; \
/bin/false)
+PHONY += arch-dtbs
arch-dtbs:
$(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs