[iMX8QXP][C57] Add support to iMX8QXP SoC and SECO C57 board
Add C57 support.
Most of the commits have a reference to a JIRA task (i.e. C57-xx). More details on the test procedure are described in the tasks' comments.
JIRA reference page: https://secogroup.atlassian.net/jira/software/c/projects/C57/boards/180/timeline