power: reset: axxia-reset: Use devm_register_sys_off_handler(RESTART)

Use device life-cycle managed register function to simplify probe.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240212162831.67838-9-afd@ti.comSigned-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/reset/axxia-reset.c

@@ -26,11 +26,10 @@
 #define SC_EFUSE_INT_STATUS	0x180c
 #define   EFUSE_READ_DONE	(1<<31)
 
-static struct regmap *syscon;
-
-static int axxia_restart_handler(struct notifier_block *this,
-				 unsigned long mode, void *cmd)
+static int axxia_restart_handler(struct sys_off_data *data)
 {
+	struct regmap *syscon = data->cb_data;
+
 	/* Access Key (0xab) */
 	regmap_write(syscon, SC_CRIT_WRITE_KEY, 0xab);
 	/* Select internal boot from 0xffff0000 */
@@ -44,14 +43,10 @@ static int axxia_restart_handler(struct notifier_block *this,
 	return NOTIFY_DONE;
 }
 
-static struct notifier_block axxia_restart_nb = {
-	.notifier_call = axxia_restart_handler,
-	.priority = 128,
-};
-
 static int axxia_reset_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct regmap *syscon;
 	int err;
 
 	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
@@ -60,7 +55,8 @@ static int axxia_reset_probe(struct platform_device *pdev)
 		return PTR_ERR(syscon);
 	}
 
-	err = register_restart_handler(&axxia_restart_nb);
+	err = devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART,
+					    128, axxia_restart_handler, syscon);
 	if (err)
 		dev_err(dev, "cannot register restart handler (err=%d)\n", err);