drivers: renesas: common: Add support for DRAM initialization on RZ/G2E SoC

DRAM initialization on RZ/G2E SoC is identical to R-Car E3 so re-use the
same.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Change-Id: I454fb40af4f8ce6c4c0d2a53edb307326efd02df
3 files changed