ACPI: processor: idle: Move max_cstate update out of the loop

The acpi_processor_cstate_first_run_checks() function, which updates
max_cstate on certain platforms, only needs to be executed once.

Move this call outside of the loop to avoid redundant executions.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Link: https://patch.msgid.link/20260311065038.4151558-3-lihuisong@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: LiHuiSong1

drivers/acpi/processor_idle.c

@@ -1359,6 +1359,8 @@ void acpi_processor_register_idle_driver(void)
 	int ret = -ENODEV;
 	int cpu;
 
+	acpi_processor_cstate_first_run_checks();
+
 	/*
 	 * ACPI idle driver is used by all possible CPUs.
 	 * Use the processor power info of one in them to set up idle states.
@@ -1370,7 +1372,6 @@ void acpi_processor_register_idle_driver(void)
 		if (!pr)
 			continue;
 
-		acpi_processor_cstate_first_run_checks();
 		ret = acpi_processor_get_power_info(pr);
 		if (!ret) {
 			pr->flags.power_setup_done = 1;