Reduce the rampant usage of goto and the indentation level in
cpufreq_set_policy() to improve the readability of that code.

No functional changes should result from that.
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>