tools/power turbostat: Do not dump TRL if turbo is not supported

Do not dump turbo ratio limits if platform does not support turbo, because it
is confusing and the TRL MSRs may even include misleading information. And they
are not supposed to be relied on if turbo is not supported.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>