imx6: aristainetos: readd aristainetos 2b board

readd aristainetos 2b board.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index d105d66..9d3fc77 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -578,6 +578,8 @@
 dtb-y += \
 	imx6dl-aristainetos2_4.dtb \
 	imx6dl-aristainetos2_7.dtb \
+	imx6dl-aristainetos2b_4.dtb \
+	imx6dl-aristainetos2b_7.dtb \
 	imx6dl-brppt2.dtb \
 	imx6dl-dhcom-pdk2.dtb \
 	imx6dl-icore.dtb \