plat: renesas: rzg: DT memory node enhancements

Add DT node support for channel 0 where physical memory is split
between 32bit space and 64bit space.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Change-Id: I99a18dbb14cdb54100a836c16445242e430794e3
1 file changed