The sun3x port needs an esp driver.  At present, it appears that
we are faced with the prospect of adding yet another batch of ugly
	#ifdef BARF_DRIVER
	...
	#endif
sections to a copy of sys/arch/sparc/dev/esp.c unless some better
way is developed to handle the necessary machine-dependent glue.
Personally, I'd rather have the MD glue in separate files, with
the MI part of the driver in sys/dev/ic or something.

Would anyone care to suggest a solution?

Gordon