arm: sun8i: h3: correct the GIC compatible in H3 to gic-400

According to the datasheets provided by Allwinner, both Allwinner H3 and
H5 use GIC-400 as their interrupt controller.

For better device tree reusing, correct the GIC compatible in H3 DTSI to
"arm,gic-400", thus this node can be reused in H5.
Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun8i-h3.dtsi

@@ -586,7 +586,7 @@ i2c2: i2c@01c2b400 {
 		};
 
 		gic: interrupt-controller@01c81000 {
-			compatible = "arm,cortex-a7-gic", "arm,cortex-a15-gic";
+			compatible = "arm,gic-400";
 			reg = <0x01c81000 0x1000>,
 			      <0x01c82000 0x2000>,
 			      <0x01c84000 0x2000>,