ARM: at91: fix missing #interrupt-cells on gpio-controller

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Tested-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi
index bafa880..63751b1 100644
--- a/arch/arm/boot/dts/at91sam9g45.dtsi
+++ b/arch/arm/boot/dts/at91sam9g45.dtsi
@@ -113,6 +113,7 @@
 				#gpio-cells = <2>;
 				gpio-controller;
 				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			pioB: gpio@fffff400 {
@@ -122,6 +123,7 @@
 				#gpio-cells = <2>;
 				gpio-controller;
 				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			pioC: gpio@fffff600 {
@@ -131,6 +133,7 @@
 				#gpio-cells = <2>;
 				gpio-controller;
 				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			pioD: gpio@fffff800 {
@@ -140,6 +143,7 @@
 				#gpio-cells = <2>;
 				gpio-controller;
 				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			pioE: gpio@fffffa00 {
@@ -149,6 +153,7 @@
 				#gpio-cells = <2>;
 				gpio-controller;
 				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			dbgu: serial@ffffee00 {