cpu/or1k: Update fpu compare symbols to imply set flag

The fpu compare symbols where not including 'sf' in the mnemonic.  So
instead of `lf-sfeq` (implying set flag if operands are equal) we were
having `lf-eq`.   This patch adds the 'sf'.  This helps with making the
generated CGEN documentation consistent and ordered correctly.

cpu/ChangeLog:

yyyy-mm-dd  Stafford Horne  <shorne@gmail.com>

	* or1korfpx.cpu (float-setflag-insn-base): Add 'sf' to symbol.