MLK-20945-4 imx8: Update container parser for RAW NOR SPL

MLK-20945-4 imx8: Update container parser for RAW NOR SPL

Since FSPI is assigned to M4 partition, A core only can read it from its
memory-map address. So we have to enable SPL NOR which won't access
flexspi driver.

Update SPL container parser for the RAW NOR support.

Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 7ea7a16fd892558098fb8cbea134ac275d1220d3)