spl: imx: Add support for new PQC container

spl: imx: Add support for new PQC container

To support PQC container format which is used for post quantum
authentication on new i.MX parts like i.MX94

The major changes compared to legacy container format is in
signature block, new container tag and version, and new alignment
of container header.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Alice Guo <alice.guo@nxp.com>
Acked-by: Peng Fan <peng.fan@nxp.com>