board: Add Toby-Churchill SL50 board support.

Add support for Lightwriter SL50 series board, a small, robust and portable
Voice Output Communication Aids (VOCA) designed to meet the particular and
changing needs of people with speech loss resulting from a wide range of
acquired, progressive and congenital conditions.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
diff --git a/board/tcl/sl50/Makefile b/board/tcl/sl50/Makefile
new file mode 100644
index 0000000..d4a548c
--- /dev/null
+++ b/board/tcl/sl50/Makefile
@@ -0,0 +1,13 @@
+#
+# Makefile
+#
+# Copyright (C) 2015 Toby Churchill Ltd - http://www.toby-churchill.com/
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+ifeq ($(CONFIG_SKIP_LOWLEVEL_INIT),)
+obj-y	:= mux.o
+endif
+
+obj-y	+= board.o