platform: Move ariane standalone fpga project to its own project

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>

platform/fpga/ariane/objects.mk

@@ -0,0 +1,8 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (C) 2019 FORTH-ICS/CARV
+#		Panagiotis Peristerakis <perister@ics.forth.gr>
+#
+
+platform-objs-y += platform.o