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/MAINTAINERS b/board/bosch/acc/MAINTAINERS
new file mode 100644
index 0000000..1b88003
--- /dev/null
+++ b/board/bosch/acc/MAINTAINERS
@@ -0,0 +1,9 @@
+MX6Q_ACC
+M:	Matthias Winker <matthias.winker@de.bosch.com>
+M:	Philip Oberfichtner <pro@denx.de>
+S:	Maintained
+F:	board/bosch/acc
+F:	include/configs/imx6q-bosch-acc.h
+F:	configs/imx6q_bosch_acc_defconfig
+F:	arch/arm/dts/imx6q-bosch-acc.dts
+F:	arch/arm/dts/imx6q-bosch-acc-u-boot.dts