Fix to mn10300 cmpsi pattern

[Matt Hiller]

On 27 Mar 2001, Alexandre Oliva wrote:

> >> These are privileged instructions.  You can't use them in user mode.
> >> How about `btst 0,%0'?
> 
> > 	Yes. That'd be better on the basis of number of instructions
> > alone, even if ors and ands to the psw weren't privileged. Okay to commit?
> 
> Yep.  Thanks for taking care of this problem!

	The testsuite caught an error in doing things that way: btst only
works with data registers, but %0 could be an address or extended
register. How about btst 0,d0 instead?

Matt