xtensa: add support for the xtensa processor architecture [2/2]

The Xtensa processor architecture is a configurable, extensible,
and synthesizable 32-bit RISC processor core provided by Tensilica, inc.

This is the second part of the basic architecture port, adding the
'arch/xtensa' directory and a readme file.

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/arch/xtensa/lib/Makefile b/arch/xtensa/lib/Makefile
new file mode 100644
index 0000000..7c7d8d5
--- /dev/null
+++ b/arch/xtensa/lib/Makefile
@@ -0,0 +1,10 @@
+#
+# (C) Copyright 2007 - 2013 Tensilica Inc.
+# (C) Copyright 2014 - 2016 Cadence Design Systems Inc.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-$(CONFIG_CMD_BOOTM) += bootm.o
+
+obj-y 	+= cache.o misc.o relocate.o time.o