[PATCH] S/390: Remove F_20 and FE_20. Adjust comments.

[Nick Clifton]

Hi Andreas,

> opcodes/ChangeLog:
> 2015-09-10  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
>
> 	* s390-opc.c: Remove unused (and broken) F_20 and FE_20 operand
> 	types and adjust numbering accordingly.  Fix some comments.

Approved - please apply.

Cheers
   Nick