[PATCH V5 4/4] board: dhelectronics: Sync env variable dh_som_serial_number with SN

[Marek Vasut]

On 12/2/24 6:29 PM, Christoph Niedermaier wrote:
> The env variable "SN" is used to store the serial number on DH electronics
> SoMs. New SoMs will use the variable "dh_som_serial_number". To ensure
> compatibility, these env variables are synchronized. This is achieved
> using callback functions.
> 
> Signed-off-by: Christoph Niedermaier <cniedermaier at dh-electronics.com>
Reviewed-by: Marek Vasut <marex at denx.de>