toradex: apalis-imx8: simplify module version handling

toradex: apalis-imx8: simplify module version handling

Simplify module version handling by removing the special case for the
Apalis iMX8QM.

The Apalis iMX8QM has been treated as a special case in module version
handling, but was always the default. By removing this special handling,
the code is simplified and easier to maintain.

We will not print the message "Unknown Apalis iMX8 module" anymore.
However, we still handle this because if the config block is missing we
show "MISSING TORADEX CONFIG BLOCK" and if the serial number is unknown
we show "Model: Toradex 0000 UNKNOWN MODULE V1.1A". Therefore, it is
still possible to detect such issues.

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>