s390: Correct prno instruction name IBM z13 (arch11) introduced ppno (Perform Pseudorandom Number Operation). IBM z14 (arch12) introduced prno (Perform Random Number Operation) and deprecated ppno. opcodes/ * s390-opc.txt: Correct prno instruction name. Signed-off-by: Jens Remus <jremus@linux.ibm.com> Reviewed-by: Andreas Krebbel <krebbel@linux.ibm.com>