arm64: tegra: Use GIC_SPI for PMIC interrupt on Smaug

Instead of hardcoding the value (0), reuse the symbolic name from
dt-bindings/interrupt-controller/arm-gic.h.
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra210-smaug.dts

@@ -1343,7 +1343,7 @@ i2c@7000d000 {
 		max77620: max77620@3c {
 			compatible = "maxim,max77620";
 			reg = <0x3c>;
-			interrupts = <0 86 IRQ_TYPE_LEVEL_HIGH>;
+			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
 
 			#interrupt-cells = <2>;
 			interrupt-controller;