[U-Boot] [PATCH] fdt: Add warning about CONFIG_OF_EMBED

[Simon Glass]

This option has crept into use with some boards. Add a warning to try to
prevent this.

As an example:
   https://lists.denx.de/pipermail/u-boot/2017-September/304966.html

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 Makefile | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Makefile b/Makefile
index 0d11ff97971..05896598fe3 100644
--- a/Makefile
+++ b/Makefile
@@ -947,6 +947,14 @@ ifeq ($(CONFIG_LIBATA)$(CONFIG_DM_SCSI)$(CONFIG_MVSATA_IDE),y)
 	@echo "Failure to update by the deadline may result in board removal."
 	@echo "See doc/driver-model/MIGRATION.txt for more info."
 	@echo "===================================================="
+endif
+ifeq ($(CONFIG_OF_EMBED),y)
+	@echo "===================== WARNING ======================"
+	@echo "CONFIG_OF_EMBED is enabled. This option should only"
+	@echo "be used for debugging purposes. Please use"
+	@echo "CONFIG_OF_SEPARATE for boards in mainline."
+	@echo "See doc/README.fdt-control for more info."
+	@echo "===================================================="
 endif
 	@# Check that this build does not use CONFIG options that we do not
 	@# know about unless they are in Kconfig. All the existing CONFIG
-- 
2.20.0.rc1.387.gf8505762e3-goog