memory and sram clarification for #address-cells and #size-cells

[mbolivar-nordic]

As of 4fc81d4, the memory
property in the "openamp,domain-v1" binding has the following in its
specification:

- *start* is the physical address of the start of the memory range. The
  number of cells used to represent the start address is determined by
  the *#address-cells* property.
- *size* is the size of the memory range, in bytes. The number of cells
  used to represent the size is determined by the *#size-cells*
  property.

There is a similar comment for sram.

In each case, the node that contains the #address-cells and
#size-cells properties is not specified. Which node is it?

[sstabellini]

I think it should be the #address-cells and #size-cells properties of the parent node.

domains {
	#address-cells = <0x2>;
	#size-cells = <0x2>;

	linux {
		memory = <0x0 0x0 0x1 0x0>