mfd: axp20x: Use devm_register_power_off_handler()

Simplify the code a bit by using devm_register_power_off_handler(), which is
a purpose-specific wrapper for devm_register_sys_off_handler().  No intended
functional changes are introduced.

Signed-off-by: Dragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/ab1f059f4b5bef75da3d3903d0fbf28bddffd57c.1731415409.git.dsimic@manjaro.org
Signed-off-by: Lee Jones <lee@kernel.org>

drivers/mfd/axp20x.c

@@ -1455,10 +1455,7 @@ int axp20x_device_probe(struct axp20x_dev *axp20x)
 	}
 
 	if (axp20x->variant != AXP288_ID)
-		devm_register_sys_off_handler(axp20x->dev,
-					      SYS_OFF_MODE_POWER_OFF,
-					      SYS_OFF_PRIO_DEFAULT,
-					      axp20x_power_off, axp20x);
+		devm_register_power_off_handler(axp20x->dev, axp20x_power_off, axp20x);
 
 	dev_info(axp20x->dev, "AXP20X driver loaded\n");