tools/power turbostat: Fix swidle header vs data display

tools/power turbostat: Fix swidle header vs data display

I changed my mind about displaying swidle statistics,
which are "added counters".  Recently I reverted the
column headers to 8-columns, but kept print_decimal_value()
padding out to 16-columns for all 64-bit counters.

Simplify by keeping print_decimial_value() at %lld -- which
will often fit into 8-columns, and live with the fact
that it can overflow and shift the other columns,
which continue to tab-delimited.

This is a better compromise than inserting a bunch
of space characters that most users don't like.

Fixes: 1a23ba6a1ba2 ("tools/power turbostat: Print wide names only for RAW 64-bit columns")
Reported-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>