[patch] Add new alu_type and logical_type attributes for MIPS.

[Catherine Moore]

Richard Sandiford wrote:

> FTR, I realise this doesn't update mips-dsp*.md or mips-fixed.md,
> but I think that's a good thing.
> 
   I thought it was a good thing too.

> OK with those changes, thanks.
> 

Thanks for the comments.  Patch committed with your suggested changes.

Catherine