[U-Boot] [PATCH] kbuild: allow null board for spl build

[Masahiro Yamada]

Commit 33a02da0 supported "<none>" for the board field of boards.cfg.
But it missed to modify spl/Makefile.

This commit provides the flexibility so we can use "<none>" board
in SPL too.
---
 spl/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spl/Makefile b/spl/Makefile
index 6fec252..db685f9 100644
--- a/spl/Makefile
+++ b/spl/Makefile
@@ -88,7 +88,7 @@ libs-y += $(CPUDIR)/
 ifdef SOC
 libs-y += $(CPUDIR)/$(SOC)/
 endif
-libs-y += board/$(BOARDDIR)/
+libs-y += $(if $(BOARDDIR),board/$(BOARDDIR)/)
 libs-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/
 
 libs-$(CONFIG_SPL_FRAMEWORK) += common/spl/
-- 
1.8.3.2