ARM: dts: pxa910: Fix the gpio interrupt cell number

gpio-pxa uses two cell to encode the interrupt source: the pin number
and the trigger type. Adjust the device node accordingly.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/pxa910.dtsi

@@ -109,7 +109,7 @@ gpio@d4019000 {
 				clocks = <&soc_clocks PXA910_CLK_GPIO>;
 				resets = <&soc_clocks PXA910_CLK_GPIO>;
 				interrupt-controller;
-				#interrupt-cells = <1>;
+				#interrupt-cells = <2>;
 				ranges;
 
 				gcb0: gpio@d4019000 {