intel_pstate: enable HWP per CPU

intel_pstate: enable HWP per CPU

intel_pstate: enable HWP per CPU

Orabug: 21325983

HWP previously was only enabled at driver load time, on the boot
CPU, however, HWP must be enabled per package. Move the code to
enable HWP to the cpufreq driver init path so that it will be
called per CPU.

Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Tested-by: David Zhuang <david.zhuang@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit ba88d4338f226766f510e207911dde8c1875e072)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
	drivers/cpufreq/intel_pstate.c
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>