cpufreq: intel_pstate: Rearrange freq QoS updates using __free()

cpufreq: intel_pstate: Rearrange freq QoS updates using __free()

Move the code from the for_each_possible_cpu() loop in update_qos_request()
to a separate function and use __free() for cpufreq policy reference
counting in it to avoid having to call cpufreq_cpu_put() repeatedly (or
using goto).

While at it, rename update_qos_request() to update_qos_requests()
because it updates multiple requests in one go.

No intentional functional impact.

Link: https://lore.kernel.org/linux-pm/CAJZ5v0gN1T5woSF0tO=TbAh+2-sWzxFjWyDbB7wG2TFCOU01iQ@mail.gmail.com/
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Zihuan Zhang <zhangzihuan@kylinos.cn>
Link: https://patch.msgid.link/3026597.e9J7NaK4W3@rafael.j.wysocki
[ rjw: Rename "cpu" to "cpudata" and "cpunum" to "cpu" in new code ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>