TEMP FIX: always call _find_current_opp(dev, opp_table)
This fixes commit 81c4d8a3. Before the commit above, we always used to obtain information about the current OPP from hardware. If this performance level was different from the one we wanted to set, we would go ahead and set it. But after this patch, we use a cached value for the current opp which (somehow) ends up being different from what hardware has knowledge of. This results in an opp change request sometimes failing.