cpufreq: intel_pstate: Fit code in a single line where possible

We can fit these lines in a single one, under the 80 characters
limit.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>