Alias armada37xx as armv8

[oznu]

Hello,

I think the armada37xx cpu type should be aliased as armv8, the same way rtd1296 is.

https://global.download.synology.com/download/Document/Software/DeveloperGuide/Firmware/DSM/7.0/enu/DSM_Developer_Guide_7_0_Beta.pdf

[picrap]

Considering this, all of the file (https://github.com/jdel/sspks/blob/master/conf/synology_models.yaml) should be reorganised. Ideally, if someone maintains a valid architecture source somewhere, that would be a good thing.

[jdel]

Gosspks has a feature to ger new models directly from syno website. Maybe we can leverage that to improve sspks https://github.com/jdel/gosspks/blob/master/handler/v1/routeModels.go