Merge branch 'abacus28-pstate_driver' into 'master'

[rennes][abacus28] update pstate_driver

See merge request !1036

data/grid5000/sites/rennes/clusters/abacus28/nodes/abacus28-1.json

@@ -298,7 +298,7 @@
     "cstate_driver": "intel_idle",
     "cstate_governor": "menu",
     "ht_enabled": true,
-    "pstate_driver": "intel_cpufreq",
+    "pstate_driver": "intel_pstate",
     "pstate_governor": "performance",
     "turboboost_enabled": true
   },

input/grid5000/sites/rennes/clusters/abacus28/nodes/abacus28-1.yaml

@@ -143,7 +143,7 @@ abacus28-1:
     cstate_driver: intel_idle
     cstate_governor: menu
     ht_enabled: true
-    pstate_driver: intel_cpufreq
+    pstate_driver: intel_pstate
     pstate_governor: performance
     turboboost_enabled: true
   processor: