ARM: at91/dt: add GPBR nodes

Add GPBR (General Purpose Block Backup Registers) nodes.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/boot/dts/at91sam9263.dtsi b/arch/arm/boot/dts/at91sam9263.dtsi
index 7f37b7e..1467750 100644
--- a/arch/arm/boot/dts/at91sam9263.dtsi
+++ b/arch/arm/boot/dts/at91sam9263.dtsi
@@ -939,6 +939,12 @@
 				clocks = <&slow_xtal>;
 				status = "disabled";
 			};
+
+			gpbr: syscon@fffffd60 {
+				compatible = "atmel,at91sam9260-gpbr", "syscon";
+				reg = <0xfffffd60 0x50>;
+				status = "disabled";
+			};
 		};
 
 		fb0: fb@0x00700000 {