cpufreq/amd-pstate: Fix prefcore rankings

commit 50a062a ("cpufreq/amd-pstate: Store the boost numerator as
highest perf again") updated the value stored for highest perf to no longer
store the highest perf value but instead the boost numerator.

This is a fixed value for systems with preferred cores and not appropriate
for use ITMT rankings. Update the value used for ITMT rankings to be the
preferred core ranking.

Reported-and-tested-by: Sebastian <sobrus@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219640
Fixes: 50a062a ("cpufreq/amd-pstate: Store the boost numerator as highest perf again")
Reviewed-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Link: https://lore.kernel.org/r/20250102141204.3413202-1-superm1@kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

Author: superm1

drivers/cpufreq/amd-pstate.c

@@ -815,7 +815,7 @@ static void amd_pstate_init_prefcore(struct amd_cpudata *cpudata)
 	 * sched_set_itmt_support(true) has been called and it is valid to
 	 * update them at any time after it has been called.
 	 */
-	sched_set_itmt_core_prio((int)READ_ONCE(cpudata->highest_perf), cpudata->cpu);
+	sched_set_itmt_core_prio((int)READ_ONCE(cpudata->prefcore_ranking), cpudata->cpu);
 
 	schedule_work(&sched_prefcore_work);
 }