Use cpufreq if available instead of hardcoding it to specific distros

fetch

@@ -590,13 +590,7 @@ getcpu () {
             cpu=${cpu/@*/}
 
             # Get cpu speed
-            case "$distro" in
-                *"buntu"* | "CentOS"*)
-                    speed=$(awk -F ': ' '/cpu MHz/ {printf $2; exit}' /proc/cpuinfo)
-                    speed=${speed/\./}
-                ;;
-
-                *)
+            if [ -d "/sys/devices/system/cpu/cpu0/cpufreq" ]; then
                 case "$speed_type" in
                     current) speed_type="scaling_cur_freq" ;;
                     min) speed_type="scaling_min_freq" ;;
@@ -609,8 +603,11 @@ getcpu () {
 
                 read -r speed < \
                     /sys/devices/system/cpu/cpu0/cpufreq/${speed_type}
-                ;;
-            esac
+
+            else
+                speed=$(awk -F ': ' '/cpu MHz/ {printf $2; exit}' /proc/cpuinfo)
+                speed=${speed/\./}
+            fi
 
             # Convert mhz to ghz without bc
             speed=$((speed / 100000))