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/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 83630af..4cfa86d 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -777,6 +777,7 @@
 ifneq ($(CONFIG_MX6Q)$(CONFIG_MX6QDL),)
 dtb-y += \
 	imx6-apalis.dtb \
+	imx6q-bosch-acc.dtb \
 	imx6q-cm-fx6.dtb \
 	imx6q-cubox-i.dtb \
 	imx6q-cubox-i-emmc-som-v15.dtb \