Correct powerpc spe opcode lookup

[Peter Bergner]

On 5/8/18 10:03 PM, Alan Modra wrote:
> On Tue, May 08, 2018 at 02:48:50PM -0500, Peter Bergner wrote:
>> Should we just remove powerpc_macros[] and move its entries into the
>> appropriate *_opcodes[] tables?
> 
> If you want to, that's fine with me.  You'll need to write some fancy
> insert and extract functions.

I think since there are a fair amount, it'll probably be easiest to convert
a few at a time until they're all gone.  Then I can delete the table itself.
Thanks.

Peter