bosch: Add initial board support for ACC

The Bosch ACC (Air Center Control) Board is based on the i.MX6D.

The device tree is copied from Linux, see [1]. The only difference
compared to the Linux DT is the removal of usbphynop properties. They are
defined in the Linux version of imx6qdl.dtsi, but not in the u-boot
version.

[1] Commit 6192cf8ac082 from
    git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git

Signed-off-by: Philip Oberfichtner <pro@denx.de>
diff --git a/board/bosch/acc/Makefile b/board/bosch/acc/Makefile
new file mode 100644
index 0000000..d425a67
--- /dev/null
+++ b/board/bosch/acc/Makefile
@@ -0,0 +1,6 @@
+# Copyright (C) 2017
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y  := acc.o