in the _PRS or _CRS of link devices. If faced with multiple DPFs in a
_PRS, we just use the first one. We assume that if _CRS has DPF tags they
only contain a single set since multiple DPFs wouldn't make any sense. In
practice, the only DPFs I've seen so far for link devices are that the one
IRQ resource is surrounded by a DPF tag pair for no apparent reason, and
this should handle that case fine now.
- Only allocate link structures for IRQ resources for link devices rather
than allocating a link structure for every resource.
Reviewed by: njl
Tested by: phk