ARM: tegra: convert device tree files to use GPIO defines

Use TEGRA_GPIO() macro to name all GPIOs referenced by GPIO properties,
and some interrupts properties. Use standard GPIO flag defines too.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index cde2f80..673f386 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -1,3 +1,5 @@
+#include <dt-bindings/gpio/tegra-gpio.h>
+
 #include "skeleton.dtsi"
 
 / {