riscv: dts: sophgo: remove address-cells from intc node

A recent submission [1] from Rob has added additionalProperties: false
to the interrupt-controller child node of RISC-V cpus, highlighting that
the new cv1800b DT has been incorrectly using #address-cells.
It has no child nodes, so #address-cells is not needed. Remove it.

Link: https://patchwork.kernel.org/project/linux-riscv/patch/[e-mail]/ [1]
Fixes: c3dffa879cca ("riscv: dts: sophgo: add initial CV1800B SoC device tree")
Reviewed-by: Jisheng Zhang <[e-mail]>
Acked-by: Chen Wang <[e-mail]>
Signed-off-by: Conor Dooley <[e-mail]>

arch/riscv/boot/dts/sophgo/cv1800b.dtsi

···
 			cpu0_intc: interrupt-controller {
 				compatible = "riscv,cpu-intc";
 				interrupt-controller;
-				#address-cells = <0>;
 				#interrupt-cells = <1>;
 			};
 		};