[bfin] Don't ICE on wrong operand

[Jie Zhang]

Bernd Schmidt wrote:
> Jie Zhang wrote:
>> This patch prevents bfin port GCC from ICE on wrong oeperand in 
>> print_operand (). bfin port GCC reports error instead.
>>
>> OK to commit?
> 
> This is OK, thanks.
> 
Done as r127780.

Jie