"#address-cells" and "#size-cells" are two properties that are not
mandatory. For instance, the DSI could refer to a bridge outside the scope
of the node rather than include a 'panel@0' subnode. By doing so, address
and size fields become then unnecessary, creating a warning at build time.
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@xxxxxxxxxxx>