As we have already support for the DesignWare DRAM controller and the
integrated DDR2 chip of V3s, let's enable the SPL support for V3s.
This patch also contains the default DRAM configuration for V3s.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>