xtensa: add support for the 'xtfpga' evaluation board

The 'xtfpga' board is actually a set of FPGA evaluation boards that
can be configured to run an Xtensa processor.

 - Avnet Xilinx LX60
 - Avnet Xilinx LX110
 - Avnet Xilinx LX200
 - Xilinx ML605
 - Xilinx KC705

These boards share the same components (open-ethernet, ns16550 serial,
lcd display, flash, etc.).

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/cadence/xtfpga/Makefile b/board/cadence/xtfpga/Makefile
new file mode 100644
index 0000000..fd8f720
--- /dev/null
+++ b/board/cadence/xtfpga/Makefile
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2007 - 2013, Tensilica Inc.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y				+= ${BOARD}.o