This adds support for the Kontron Electronics OSM-S i.MX93 SoM
and the matching baseboard BL i.MX93.
The SoM hardware complies to the Open Standard Module (OSM) 1.1
specification, size S (https://sget.org/standards/osm).
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
