RFA: Mark DIVS and DIVU SH2A instructions as unusable in delay slots

[Joern RENNECKE]

Nick Clifton wrote:

>     My understanding is that this processor does not allow these 
> instructions in the delay slots at all.  Or rather that the presence 
> of such instructions in the delay slot is illegal and their behaviour 
> will be undefined.  This was confirmed for us by Allan Tajii of Renesas. 


The patch is OK then to apply.