cpu_load: merge back Darwin and FreeBSD

liquidprompt

@@ -114,7 +114,7 @@ case "$LP_OS" in
             echo "$load"
         }
         ;;
-    FreeBSD)
+    FreeBSD|Darwin|OpenBSD)
         _lp_cpu_load () {
             local bol load eol
             # If you have problems with syntax coloring due to the following
@@ -124,21 +124,6 @@ case "$LP_OS" in
             echo "$load"
         }
         ;;
-    Darwin)
-        _lp_cpu_load () {
-            local bol load eol
-            read bol load eol <<<$( LANG=C sysctl -n vm.loadavg )
-            echo "$load"
-        }
-        LP_DWIN_KERNEL_REL_VER=$(uname -r | cut -d . -f 1)
-        ;;
-    OpenBSD)
-        _lp_cpu_load() {
-            local bol load eol
-            read one two three <<< `sysctl -n vm.loadavg`
-            echo "$load"
-        }
-        ;;
     SunOS)
         _lp_cpu_load () {
             LANG=C uptime | awk '{print substr($10,0,length($10))}'