ARM: board: udoo_neo: Import UDOO Neo dts files

Import the i.MX6SX based UDOO Neo dts files from Linux 5.12-rc1
and sync the i.MX6SX pinfunc.h

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Cc: Francesco Montefoschi <francesco.montefoschi@udoo.org>
Cc: Breno Lima <breno.lima@nxp.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 1dd6c4b..aec5020 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -776,7 +776,10 @@
 dtb-$(CONFIG_MX6SX) += \
 	imx6sx-sabreauto.dtb \
 	imx6sx-sdb.dtb \
-	imx6sx-softing-vining-2000.dtb
+	imx6sx-softing-vining-2000.dtb \
+	imx6sx-udoo-neo-basic.dtb \
+	imx6sx-udoo-neo-extended.dtb \
+	imx6sx-udoo-neo-full.dtb
 
 dtb-$(CONFIG_MX6UL) += \
 	imx6ul-geam.dtb \