ARM: dts: imx6ull: add IOMUXC SNVS instance

The i.MX 6ULL features another IOMUX Controller called IOMUXC
SNVS which allows to control BOOT_MODE and TAMPER pins. Add the
controller to the i.MX 6ULL specific imx6ull.dtsi device tree.
Signed-off-by: NStefan Agner <stefan@agner.ch>
Reviewed-by: NRob Herring <robh@kernel.org>
Acked-by: NDong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6ull.dtsi

@@ -42,3 +42,20 @@
 #include "imx6ul.dtsi"
 #include "imx6ull-pinfunc.h"
 #include "imx6ull-pinfunc-snvs.h"
+
+/ {
+	soc {
+		aips3: aips-bus@2200000 {
+			compatible = "fsl,aips-bus", "simple-bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x02200000 0x100000>;
+			ranges;
+
+			iomuxc_snvs: iomuxc-snvs@2290000 {
+				compatible = "fsl,imx6ull-iomuxc-snvs";
+				reg = <0x02290000 0x4000>;
+			};
+		};
+	};
+};