p/cpu_freq_1sec: fix the indentation

plugins/rpi/cpu_freq_1sec

@@ -24,8 +24,8 @@ then
                         )
                 done | awk "{
                     print \"scaling_cur_freq.value \" \$1 \":\" (\$2 * 1000);
-				system(\"\");
-                        }" >> $cache
+                    system(\"\");
+                }" >> $cache
         ) &
         echo $! > $pidfile
         exit 0