ARM: ux500: Change the type of interrupt to something compatible

On boot the Nomadik GPIO controller complains that an IRQ can't be
configured as active high level-sensitive, so this patch converts
it to be low-to-high edge triggered instead.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

arch/arm/boot/dts/stuib.dtsi

@@ -15,7 +15,7 @@ i2c@80004000 {
 			stmpe1601: stmpe1601@40 {
 				compatible = "st,stmpe1601";
 				reg = <0x40>;
-				interrupts = <26 0x4>;
+				interrupts = <26 0x1>;
 				interrupt-parent = <&gpio6>;
 				interrupt-controller;