Removed possible zero-replication code
Created by: silabs-oysteink
Changed calculation of interrupt threshold output and mcountinhibit_mask to avoid possible zero-replication errors.
SEC clean.
- Checked with NUM_MHPMCOUTERS values [0,7,29]
- Checked with SMCLIC_INTTHRESBITS values [1,2,8]
Signed-off-by: Oystein Knauserud Oystein.Knauserud@silabs.com