[coreboot] patch: a few fixes for build_opt_tbl

[Patrick Georgi]

Am Sonntag, den 27.09.2009, 21:17 -0700 schrieb ron minnich:
> Make the error messages somewhat less incomprehensible. I forget 
> what they mean every time I see them. 
> 
> Add a proto. More work remains to be done.
> 
> Build tested on dell s1850. 
> 
> Signed-off-by: Ronald G. Minnich <rminnich at gmail.com>
> 
Thanks, committed as r4684


Patrick