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 a7a604303cc63ae836b8c4c16635514c24e6c3ef..4970223b3d2ee438f8d84ba150689f81bb086411 100644 (file)
--- a/dts/Makefile
+++ b/dts/Makefile
@@ -40,6 +40,7 @@ endif
        echo >&2;                                                       \
        /bin/false)
 
+PHONY += arch-dtbs
 arch-dtbs:
        $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs