board: cssi: Use HAVE_VENDOR_COMMON_LIB logic
Instead of cross using cross-directory makefile directives,
add a Makefile in board/cssi/common/ directory in order to
benefit from HAVE_VENDOR_COMMON_LIB logic.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
diff --git a/board/cssi/common/Makefile b/board/cssi/common/Makefile
new file mode 100644
index 0000000..9735826
--- /dev/null
+++ b/board/cssi/common/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2024 CS GROUP France
+# Christophe Leroy <christophe.leroy@csgroup.eu>
+#
+
+obj-$(CONFIG_TARGET_CMPC885) += common.o
+obj-$(CONFIG_TARGET_CMPCPRO) += common.o