burn_mtd script fixes

[ron minnich]

On 14 Aug 2003, Roger wrote:

> Fails to load module mtdchar.o (or atleast on my boxens with Gentoo)
>  - Should probably load mtdchar at the time doc2001 & docprobe are
> loaded.

yikes, that has not failed in years. I'll try to look.

> /dev/mtd0 should probably be named /dev/mtd/0

only with devfs. OK, how do we cleanly work around the naming problem, 
given that devfs is living on borrowed time?

ron