cpupower: Fix turbo frequency reporting for pre-Sandy Bridge cores

cpupower: Fix turbo frequency reporting for pre-Sandy Bridge cores

The switch that conditionally sets CPUPOWER_CAP_HAS_TURBO_RATIO and
CPUPOWER_CAP_IS_SNB flags is missing a break, so all cores get both
flags set and an assumed base clock of 100 MHz for turbo values.

Reported-by: GSR <gsr.bugs@infernal-iceberg.com>
Tested-by: GSR <gsr.bugs@infernal-iceberg.com>
References: https://bugs.debian.org/859978
Fixes: 8fb2e440b223 ("cpupower: Show Intel turbo ratio support via ...")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Gbp-Pq: Topic bugfix/x86
Gbp-Pq: Name cpupower-fix-turbo-frequency-reporting-for-pre-sandy.patch