ARM: dts: sunxi: Change default CMA pool node name

The CMA node has a unit address, but no reg property which generates a
warning in DTC. Change the node name to reflect its usage and drop the unit
address.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun5i.dtsi

@@ -114,7 +114,7 @@
 		ranges;
 
 		/* Address must be kept in the lower 256 MiBs of DRAM for VE. */
-		cma_pool: cma@4a000000 {
+		cma_pool: default-pool {
 			compatible = "shared-dma-pool";
 			size = <0x6000000>;
 			alloc-ranges = <0x4a000000 0x6000000>;