ARM: ux500: Apply a Device Tree node for the STMPE MFD

Here we apply the STMPE Multi-Functional Device's node to the
ST User Interface Board Device Tree file. It includes all of
the properties required for correct device initialsation.
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

arch/arm/boot/dts/stuib.dtsi

@@ -11,6 +11,19 @@
 
 / {
 	soc-u9500 {
+		i2c@80004000 {
+			stmpe1601: stmpe1601@40 {
+				compatible = "st,stmpe1601";
+				reg = <0x40>;
+				interrupts = <26 0x4>;
+				interrupt-parent = <&gpio6>;
+				interrupt-controller;
+
+				wakeup-source;
+				st,autosleep-timeout = <1024>;
+			};
+		};
+
 		i2c@80110000 {
 			bu21013_tp@0x5c {
 				compatible = "rhom,bu21013_tp";