Update cpu_freq_scaling.sh

Fixed some inaccuracies about Intel pstate.

utils/cpu_freq_scaling.sh

@@ -1,10 +1,5 @@
 #!/bin/bash
 
-##########################################################
-# *IMPORTANT*: This script doesn't work for Intel pstate.
-# Disable frequency scaling manually if CPU has pstate.
-##########################################################
-
 NUM_CORES=$(nproc --all)
 
 # Silent pushd and popd
@@ -15,20 +10,15 @@ popd () {
     command popd "$@" > /dev/null
 }
 
-# Check if the CPU has pstate
-if [ -d intel_pstate ]; then
-    echo "Intel pstate detected. Please disable frequency scaling manually."
-    exit 1
-fi
+pushd /sys/devices/system/cpu
 
 # Check if the CPU has cpufreq
 if [ ! -d cpu0/cpufreq ]; then
     echo "CPU frequency scaling not supported."
+    popd
     exit 1
 fi
 
-pushd /sys/devices/system/cpu
-
 for i in $(seq 0 $(($NUM_CORES-1)))
 do
     pushd "cpu${i}"/cpufreq