[PATCH,z80] Treat undocumented instruction sli properly.

[Nick Clifton]

Hi Arnold,

> gas/Changelog
> 2018-08-16 Arnold Metselaar <arnold.metsel@gmail.com>
> 	* config/tc-z80.c: Correct treatment of undocumented instruction sli/sll. 
> 	(emit_mr): Add argument unportable.
> 	(emit_bit): Adapt call to emit_mr.
> 	(emit_mr_z80): New function.
> 	(emit_mr_unportable): New function.
> 	(instab[]): Replace emit_mr with emit_mr_z80 or emit_mr_unportable as 
> appropriate.
 
Approved and applied.  Thanks for making one final patch! :-)

Cheers
  Nick