arm64: Use the common activate function in nexus

[andrew]

Summary

For non-memory and non-ioport spaces use the common
bus_generic_rman_activate_resource function in the arm64 nexus. We
can't currently use it for memory types as it doesn't support
non-posted memory.

Sponsored by: Arm Ltd

[jhb]

Is the same change needed for nexus drivers on other INTRNG platforms? I guess it isn't required, per se, but it is a nice cleanup to reduce duplicated code?

[andrew]

I think the other drivers can use bus_generic_rman_activate_resource directly, however I can't easily test them.

[cperciva]

Should I be testing this on Graviton (with my _AEI patches minus the bogus resource activation one)?

[mmel]

+1 for deduplication

sys/arm64/arm64/nexus.c

362

Isn't removing intr_activate_irq() a mistake? I can't find who calls it after the patch...

[andrew]

In D47283#1078259, @cperciva wrote:

Should I be testing this on Graviton (with my _AEI patches minus the bogus resource activation one)?

This one is optional, it's a cleanup after merging common code.

sys/arm64/arm64/nexus.c

362

See D47282