Fixes after merging from CV32E40X
Created by: silabs-oysteink
Using last_sec_op instead of last_op when detecting mret_self_stall in controller bypass. Update done because an mret which restarts pointer fetch will not signal last_op until the pointer arrives. Using last_op when checking for mret_self_stall will then not be correct.
Not setting instr_meta.tbljmp for dummy instructions.
Signed-off-by: Oystein Knauserud Oystein.Knauserud@silabs.com