cpufreq: Pass policy pointer to ->update_limits()

Since cpufreq_update_limits() obtains a cpufreq policy pointer for the
given CPU and reference counts the corresponding policy object, it may
as well pass the policy pointer to the cpufreq driver's ->update_limits()
callback which allows that callback to avoid invoking cpufreq_cpu_get()
for the same CPU.

Accordingly, redefine ->update_limits() to take a policy pointer instead
of a CPU number and update both drivers implementing it, intel_pstate
and amd-pstate, as needed.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Reviewed-by: Mario Limonciello <[email protected]>
Acked-by: Srinivas Pandruvada <[email protected]>
Acked-by: Sudeep Holla <[email protected]>
Tested-by: Sudeep Holla <[email protected]>
Link: https://patch.msgid.link/[email protected]

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