s390/cpumf: Add extended counter set definitions for model 8561 and 8562

Add the extended counter set definitions for s390 machine types
8561 and  8262. They are identical with machine types 3906 and
3907.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>