platform: add template platform files

Create commented template files to use as a base for new platforms
support implementation.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>

platform/template/objects.mk

@@ -0,0 +1,15 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2019 Western Digital Corporation or its affiliates.
+#
+
+# Space separated list of object file names to be compiled for the platform
+platform-objs-y += platform.o
+
+#
+# If the platform support requires a device tree file, the name of the device
+# tree compiled file should be specified here. The device tree source file
+# be in the form <dt file name>.dts
+#
+# platform-dtb-y += <dt file name>.dtb