ARM: zynq: Fix size-cells for pl353 driver

"size-cells" of the nand controller node should be 0 as the "reg"
property of the nand device node contains the chip select number and not
address information.
The patch fixes the below compilation warning
arch/arm/dts/zynq-zc770-xm011.dtb: Warning (reg_format):
/axi/memory-controller@e000e000/nand-controller@0,0/nand@0:reg: property
has invalid length (4 bytes) (#address-cells == 1, #size-cells == 1)

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/6e90665a2dad7fe8ade10b8f57101f8144963791.1655288559.git.michal.simek@amd.com
diff --git a/arch/arm/dts/zynq-7000.dtsi b/arch/arm/dts/zynq-7000.dtsi
index 9495911..37155df 100644
--- a/arch/arm/dts/zynq-7000.dtsi
+++ b/arch/arm/dts/zynq-7000.dtsi
@@ -287,7 +287,7 @@
 				reg = <0 0 0x1000000>;
 				status = "disabled";
 				#address-cells = <1>;
-				#size-cells = <1>;
+				#size-cells = <0>;
 			};
 			nor0: flash@1,0 {
 				status = "disabled";