Integrate u-boot-seco-imx/seco_lf_v2021.04_santino_ddr
Commit: clea-os/bsp/nxp/u-boot-seco-imx@6c0969a1
[SANTINO][DDR] Fix DDR table for 2x512MB
Setup the DDR table to access all the available RAM on Santino 2x512MB.
Signed-off-by: Nicola Sparnacci nicola.sparnacci@seco.com