The upcoming db845c doesn't have cellular modem capabilities, but still
has wifi. Avoid installing modem related configs and services by default
and only install it for devices that need it.
The soc-qcom-sdm845* packages are mostly sufficient, but there are a few
issues that all MSM8998 devices on mainline will face, so include
workarounds for them in a generic package all device pkgs can depend on.
Caleb Connolly