cpupower: Add missing newline at end of file

"git diff" says:

    \ No newline at end of file

after modifying the files.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/power/cpupower/bench/cpufreq-bench_plot.sh

@@ -88,4 +88,4 @@ done
 echo >> $dir/plot_script.gpl
 
 gnuplot $dir/plot_script.gpl
-rm -r $dir
\ No newline at end of file
+rm -r $dir

tools/power/cpupower/bench/cpufreq-bench_script.sh

@@ -85,4 +85,4 @@ function create_plots()
 }
 
 measure
-create_plots
\ No newline at end of file
+create_plots