cpufreq/amd-pstate: Remove the unncecessary driver_lock in amd_pstate_update_limits

There is no need to take a driver wide lock while updating the
highest_perf value in the percpu cpudata struct. Hence remove it.

Signed-off-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/r/20250205112523.201101-13-dhananjay.ugwekar@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

Author: dhananjay-AMD

drivers/cpufreq/amd-pstate.c

@@ -832,8 +832,6 @@ static void amd_pstate_update_limits(unsigned int cpu)
 	if (!policy)
 		return;
 
-	guard(mutex)(&amd_pstate_driver_lock);
-
 	if (amd_get_highest_perf(cpu, &cur_high))
 		return;