Modify current_spl_level to reflect the temporary change in interrupt
priority level which dispatching.
Don't increment the interrupt stats for every handler in the interrupt chain.
Cleaned up a number of comments.
Define soft interrupt names.
A few miscellaneous tidy ups.
will again compile. This code needs a bunch of cleanup, and the
"generic OFW kernel" code should probably be split into a different
directory than the code which implements the interface to OFW.
Reference Design NetBSD source code, obtained from the pages under
http://www.research.digital.com/SRC/iag . Some of this code (badly)
needs to be cleaned up, and as-is it doesn't compile. However, getting
it in the tree is a start.