If CPU is included or not in the mask with all ports the rtu_stat shall display
"ALL CPU"

rtu_stat add mask 01:80:c2:00:00:53 0x3ffff 0
rtu_stat add mask 01:80:c2:00:00:57 0x7ffff 0

rtu_stat displayed:
[...]
01:80:c2:00:00:53         ALL           0          STATIC  (hash 014:0)   -
01:80:c2:00:00:57         ALL           0          STATIC  (hash 090:0)   -
[...]

now:
[...]
01:80:c2:00:00:53         ALL           0          STATIC  (hash 014:0)   -
01:80:c2:00:00:57         ALL CPU       0          STATIC  (hash 090:0)   -
[...]

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>