hw/npu2: Don't assert if we hit a mixed OpenCAPI/NVLink setup
hw/npu2: Don't assert if we hit a mixed OpenCAPI/NVLink setup

If our device tree contains a mix of OpenCAPI and NVLink links, that's a
problem, but it's not fatal and we should simply abort NPU init rather than
kill the machine - this is helpful for doing further debugging.

Signed-off-by: Andrew Donnellan <efc2d7c347a094a6ec1d918179e819039044c564@au1.ibm.com>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.ibm.com>

shenki/skiboot,shenki/skiboot,qemu/skiboot,legoater/skiboot,qemu/skiboot,legoater/skiboot,open-power/skiboot,legoater/skiboot,stewart-ibm/skiboot,stewart-ibm/skiboot,qemu/skiboot,legoater/skiboot,shenki/skiboot,qemu/skiboot,open-power/skiboot,open-power/skiboot,shenki/skiboot,open-power/skiboot,shenki/skiboot,stewart-ibm/skiboot,open-power/skiboot,qemu/skiboot,legoater/skiboot