tools/power turbostat: Add --show and --hide parameters

Add the "--show" and "--hide" cmdline parameters.

By default, turbostat shows all columns.

turbostat --hide counter_list
will continue showing all columns, except for those listed.

turbostat --show counter_list
will show _only_ the listed columns

These features work for built-in counters, and have no effect
on columns added with the --add parameter.
Signed-off-by: Len Brown <len.brown@intel.com>

tools/power/x86/turbostat/turbostat.8

@@ -47,6 +47,10 @@ name as necessary to disambiguate it from others is necessary.  Note that option
 		default: delta
 .fi
 .PP
+\fB--hide column\fP do not show the specified columns.  May be invoked multiple times, or with a comma-separated list of column names.
+.PP
+\fB--show column\fP show only the specified columns.  May be invoked multiple times, or with a comma-separated list of column names.
+.PP
 \fB--Dump\fP displays the raw counter values.
 .PP
 \fB--debug\fP displays additional system configuration information.  Invoking this parameter