These fields are used for EAX12 and EX6250v2 series, and perhaps other
devices. Compatibility is preserved with the WAX202 and WAX206.
In addition, adds the related vars to DEVICE_VARS so that the variables
work correctly with multiple devices.
References in GPL source:
https://www.downloads.netgear.com/files/GPL/EAX12_EAX11v2_EAX15v2_GPL_V1.0.3.34_src.tar.gz
* tools/imgencoder/src/gj_enc.c
Contains code that generates the encrypted image.
Signed-off-by: Wenli Looi <wlooi@ucalgary.ca>