firmware: arm_scmi: Convert to SYSTEM_SLEEP_PM_OPS

The old SET_SYSTEM_SLEEP_PM_OPS() macro leads to a warning about an
unused function:

  |  drivers/firmware/arm_scmi/scmi_power_control.c:363:12: error:
  | 	'scmi_system_power_resume' defined but not used [-Werror=unused-function]
  |         static int scmi_system_power_resume(struct device *dev)

The proper way to do this these days is to use SYSTEM_SLEEP_PM_OPS()
and pm_sleep_ptr().

Fixes: 9a0658d ("firmware: arm_scmi: power_control: Ensure SCMI_SYSPOWER_IDLE is set early during resume")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peng Fan <peng.fan@nxp.com>
Message-Id: <20250709070107.1388512-1-arnd@kernel.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

Author: arndb

drivers/firmware/arm_scmi/scmi_power_control.c

@@ -369,7 +369,7 @@ static int scmi_system_power_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops scmi_system_power_pmops = {
-	SET_SYSTEM_SLEEP_PM_OPS(NULL, scmi_system_power_resume)
+	SYSTEM_SLEEP_PM_OPS(NULL, scmi_system_power_resume)
 };
 
 static const struct scmi_device_id scmi_id_table[] = {
@@ -380,7 +380,7 @@ MODULE_DEVICE_TABLE(scmi, scmi_id_table);
 
 static struct scmi_driver scmi_system_power_driver = {
 	.driver	= {
-		.pm = &scmi_system_power_pmops,
+		.pm = pm_sleep_ptr(&scmi_system_power_pmops),
 	},
 	.name = "scmi-system-power",
 	.probe = scmi_syspower_probe,