arm: am57xx: cl-som-am57x: add initial board support

Features supported :

* Serial console
* SPI Flash
* MMC/SD Card
* eMMC storage
* SATA
* PCA9555 - GPIO expander over I2C5 bus
* USB

Use spl alternate boot device feature to define fallback to
the main boot device as it is defined by hardware.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
[uri.mashiach@compulab.co.il: Adjust to v2016.11]
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
diff --git a/board/compulab/cl-som-am57x/Makefile b/board/compulab/cl-som-am57x/Makefile
new file mode 100644
index 0000000..0c59781
--- /dev/null
+++ b/board/compulab/cl-som-am57x/Makefile
@@ -0,0 +1,15 @@
+#
+# Makefile
+#
+# (C) Copyright 2016 CompuLab, Ltd. <www.compulab.co.il>
+#
+# Author: Dmitry Lifshitz <lifshitz@compulab.co.il>
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+ifdef CONFIG_SPL_BUILD
+obj-y	+= spl.o mux.o
+else
+obj-y	+= cl-som-am57x.o mux.o
+endif