dtc: Simplify error handling for unparseable input

[Scott Wood]

On Tue, Mar 25, 2008 at 12:28:05PM +1100, David Gibson wrote:
> On Mon, Mar 24, 2008 at 12:36:41PM -0500, Scott Wood wrote:
> > If you remove this, there'll be no way to indicate semantic errors other
> > than die() (the NULL approaches are no good, since they inhibit recovery),
> > which is suboptimal if the error is not immediately fatal.
> 
> But everything is immediately fatal.  When we have a *real* example of
> something that's not, we can restore an error code.

Failed binary includes are not immediately fatal.

-Scott