kbuild: add dummy obj-y to create built-in.o
We are going to switch over to Kbuild in upcoming commits.
Each makefile must have non-empty obj- or obj-y
to generate built-in.o on Kbuild.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/board/spear/x600/Makefile b/board/spear/x600/Makefile
index f9053fe..18d3dd2 100644
--- a/board/spear/x600/Makefile
+++ b/board/spear/x600/Makefile
@@ -5,6 +5,9 @@
# SPDX-License-Identifier: GPL-2.0+
#
-ifndef CONFIG_SPL_BUILD
+ifdef CONFIG_SPL_BUILD
+# necessary to create built-in.o
+obj- := __dummy__.o
+else
obj-y := fpga.o x600.o
endif