ACPI: processor: idle: Convert acpi_processor_setup_cpuidle_states() to void

Since all callers of acpi_processor_setup_cpuidle_states() ignore its
return value and it simply passes the acpi_processor_setup_lpi_states()
return value to its callers, convert both of these functions to void.

No intentional functional impact.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
[ rjw: Subject and changelog edits ]
Link: https://patch.msgid.link/20260120112258.1595164-2-lihuisong@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: LiHuiSong1

drivers/acpi/processor_idle.c

@@ -1180,15 +1180,15 @@ static int acpi_idle_lpi_enter(struct cpuidle_device *dev,
 	return -EINVAL;
 }
 
-static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
+static void acpi_processor_setup_lpi_states(struct acpi_processor *pr)
 {
 	int i;
 	struct acpi_lpi_state *lpi;
 	struct cpuidle_state *state;
 	struct cpuidle_driver *drv = &acpi_idle_driver;
 
 	if (!pr->flags.has_lpi)
-		return -EOPNOTSUPP;
+		return;
 
 	for (i = 0; i < pr->power.count && i < CPUIDLE_STATE_MAX; i++) {
 		lpi = &pr->power.lpi_states[i];
@@ -1206,8 +1206,6 @@ static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
 	}
 
 	drv->state_count = i;
-
-	return 0;
 }
 
 /**
@@ -1216,25 +1214,26 @@ static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
  *
  * @pr: the ACPI processor
  */
-static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
+static void acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
 {
 	int i;
 	struct cpuidle_driver *drv = &acpi_idle_driver;
 
 	if (!pr->flags.power_setup_done || !pr->flags.power)
-		return -EINVAL;
+		return;
 
 	drv->safe_state_index = -1;
 	for (i = ACPI_IDLE_STATE_START; i < CPUIDLE_STATE_MAX; i++) {
 		drv->states[i].name[0] = '\0';
 		drv->states[i].desc[0] = '\0';
 	}
 
-	if (pr->flags.has_lpi)
-		return acpi_processor_setup_lpi_states(pr);
+	if (pr->flags.has_lpi) {
+		acpi_processor_setup_lpi_states(pr);
+		return;
+	}
 
 	acpi_processor_setup_cstates(pr);
-	return 0;
 }
 
 /**