dt: bcm968580xref: enable gpio controller

Enable all the gpio controllers in the device tree
of the board bcm968580xref.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/arch/arm/dts/bcm968580xref.dts b/arch/arm/dts/bcm968580xref.dts
index 0c59f94..15febb0 100644
--- a/arch/arm/dts/bcm968580xref.dts
+++ b/arch/arm/dts/bcm968580xref.dts
@@ -29,3 +29,35 @@
 	u-boot,dm-pre-reloc;
 	status = "okay";
 };
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&gpio2 {
+	status = "okay";
+};
+
+&gpio3 {
+	status = "okay";
+};
+
+&gpio4 {
+	status = "okay";
+};
+
+&gpio5 {
+	status = "okay";
+};
+
+&gpio6 {
+	status = "okay";
+};
+
+&gpio7 {
+	status = "okay";
+};