fix tests to use the new hardware performance monitors
Created by: silabs-PaulZ
The CV32E40P core has an RTL update that will replace the performance counters with the HPM as specified in the privilege specification. The hello_world and sanity test pass, but it will break the firmware tests.
This PR will fix these firmware tests to work with the core update from: https://github.com/openhwgroup/cv32e40p/pull/33