[MiNT] No more NOCFLAGS for the FreeMiNT CPU options

[Vincent Rivière <vincent.riviere@freesbee.fr>]

Hello.

As a side effect of the FreeMiNT for ColdFire patches, there are no more 
NOCFLAGS used to hack the CPU options for some sources.

As a result, all the kernels (68000, 68030, ColdFire, etc...) are now fully 
optimized for their target processor. A few C files were previously 
optimized only for 68000. I don't think we will see any speed difference, 
but anyway, things are now cleaner and theoretically a bit faster.

In order to avoid breaking the compilation, I needed to add ".arch   68030" 
at the top of a few assembler files in the arch subdir. This does not affect 
the execution speed in any way. However, I think it is a bit insane to 
include incompatible instructions in a binary targeting a specific CPU. This 
is not a big issue, because such instructions are usually only executed when 
running on a specific CPU. That could be cleaned up later using #ifdefs, if 
it appears to be a good thing.

--
Vincent Rivière