mfd: axp20x: Add AC power supply cells for AXP22X PMICs

The X-Powers AXP20X and AXP22X PMICs expose the status of AC power
supply.

This adds the AC power supply driver to the MFD cells of the AXP22X
PMICs.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-By: Sebastian Reichel <sre@kernel.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/axp20x.c

@@ -613,6 +613,11 @@ static struct mfd_cell axp221_cells[] = {
 		.name		= "axp20x-regulator",
 	}, {
 		.name		= "axp22x-adc"
+	}, {
+		.name		= "axp20x-ac-power-supply",
+		.of_compatible	= "x-powers,axp221-ac-power-supply",
+		.num_resources	= ARRAY_SIZE(axp20x_ac_power_supply_resources),
+		.resources	= axp20x_ac_power_supply_resources,
 	}, {
 		.name		= "axp20x-usb-power-supply",
 		.of_compatible	= "x-powers,axp221-usb-power-supply",
@@ -630,6 +635,11 @@ static struct mfd_cell axp223_cells[] = {
 		.name		= "axp22x-adc",
 	}, {
 		.name			= "axp20x-regulator",
+	}, {
+		.name		= "axp20x-ac-power-supply",
+		.of_compatible	= "x-powers,axp221-ac-power-supply",
+		.num_resources	= ARRAY_SIZE(axp20x_ac_power_supply_resources),
+		.resources	= axp20x_ac_power_supply_resources,
 	}, {
 		.name		= "axp20x-usb-power-supply",
 		.of_compatible	= "x-powers,axp223-usb-power-supply",