arm64: dts: allwinner: h6: Move GIC device node fix base address ordering

The GIC device node was placed out of order in the initial device tree
submission. Move it so the nodes are correctly sorted by base address
again.

Fixes: e54be32d ("arm64: allwinner: h6: add the basical Allwinner H6 DTSI file")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>