ARM: at91: dt: switch to standard GPIO flag defines.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/boot/dts/sama5d3.dtsi b/arch/arm/boot/dts/sama5d3.dtsi
index 2293fa1..0d65e3d 100644
--- a/arch/arm/boot/dts/sama5d3.dtsi
+++ b/arch/arm/boot/dts/sama5d3.dtsi
@@ -9,6 +9,7 @@
  */
 
 #include "skeleton.dtsi"
+#include <dt-bindings/gpio/gpio.h>
 
 / {
 	model = "Atmel SAMA5D3 family SoC";