The new HWID fields make U-Boot create new variable 'module_ram'.
If it exists use it to select the U-Boot file to use during
firmware update. If not, fall back to old method of using the
variant code and the hard-coded table of variants.
Signed-off-by: Hector Palacios <hector.palacios@digi.com>
https://jira.digi.com/browse/DEL-6598