Hi,
	I'd like to change the console polling interface requirement in that
	cnpollc(9) and hence cngetc(9) would always need to be called on splhigh().
	The idea here is that if we are polling, we don't want any interrupts
	to happen. I'm including the diff to do so. This seems like a better
	solution that I posted previously.

	Opinions?

No.  cnpollc() is supposed to turn polling on or off.  If you want to
twiddle with spl levels it should be in there.

Eduardo