Improve error tolerance

[farshidtz]

CPUs not set:

Error: failed to load config file: failed to validate irq tuning: invalid cpus: invalid CPU: 
exit status 1

Filter not set (this is expected):

Rule: my wireless interface
+ Skipped read-only (managed?) IRQs: 133,136-151
+ Assigned IRQs 1,8-9,12,14,17,21,29-30,120-125,134-135,152-170 to CPUs 2-3

Scaling governance not set:

Rule: kernel cores 
+ Set scaling governance of CPUs 0-1 to 
└── Set max frequency of CPUs 0-1 to 2.5GHz

Only CPUs set:

Rule: kernel cores 
+ Set scaling governance of CPUs 0-1 to