arm64: dts: imx8mm-kontron: Fix OSM-S devicetrees to match latest hardware
The current state of the devicetree for the i.MX8MM OSM-S and the BL
baseboard reflects deprecated prototype hardware. Update the board
description to match the latest hardware revision.
As the old hardware is not available anymore, was only produced in
very small quantities and was broken in some ways, we can safely
fixup the original devicetree.
Fixes: de9618e84f76 ("arm64: dts: Add support for Kontron SL/BL i.MX8MM OSM-S")
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>