ram: rockchip: Add rv1126 ddr loader params

Add DDR loader parameters for Rockchip RV1126 SoC.

Signed-off-by: YouMin Chen <cym@rock-chips.com>
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>