e60ff6a3b4
This replaces a partial workaround introduced in r305527 that was incompatible with nested INTRNG interrupt controllers if not also using FDT. On non-FDT MIPS INTRNG targets, we now preemptively produce a set of fixed mappings for the MIPS IRQ range during nexus attach. On FDT targets, OFW_BUS_MAP_INTR() remains responsible for mapping the MIPS IRQs. Approved by: adrian (mentor) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D12385