Switch default governor to schedutil on >32 threads machines when it's set to ondemand

Ondemand doesn't scale well with that many cores

linux-tkg-config/prepare

@@ -1092,6 +1092,12 @@ _tkg_srcprep() {
     fi
   done
 
+  # Use schedutil instead of ondemand on >32 threads machines
+  if [[ $(nproc) -gt 32 ]] && [ "$_default_cpu_gov" = "ondemand" ]; then
+    warning "The current default governor selected (ondemand) doesn't perform well on >32 threads. Schedutil will be used instead."
+    _default_cpu_gov="schedutil"
+  fi
+
   # default cpu gov
   if [ "$_default_cpu_gov" = "performance" ]; then
     _disable "CPU_FREQ_DEFAULT_GOV_SCHEDUTIL"