tools/power turbostat: correct output for MSR_NHM_SNB_PKG_CST_CFG_CTL dump

tools/power turbostat: correct output for MSR_NHM_SNB_PKG_CST_CFG_CTL dump

BugLink: http://bugs.launchpad.net/bugs/1591802
MSR_NHM_SNB_PKG_CST_CFG_CTL: 0x1e008008 (...pkg-cstate-limit=0: unlimited)
should print as
MSR_NHM_SNB_PKG_CST_CFG_CTL: 0x1e008008 (...pkg-cstate-limit=8: unlimited)

Signed-off-by: Len Brown <len.brown@intel.com>
(cherry picked from commit 6c34f160df82ae07bfff5b4c51f50622e9c2759e)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Acked-by: Kamal Mostafa <kamal@canonical.com>