sunxi: axp221: Add axp223 support

The axp223 appears to be the same as the axp221, except that it uses the
rsb to communicate rather then the p2wi. At least all the registers we use
are 100% the same.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 1ec7c0e..7373a79 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -1,10 +1,10 @@
 config AXP221_POWER
-	boolean "axp221 pmic support"
-	depends on MACH_SUN6I
+	boolean "axp221 / axp223 pmic support"
+	depends on MACH_SUN6I || MACH_SUN8I
 	default y
 	---help---
-	Say y here to enable support for the axp221 pmic found on most sun6i
-	(A31) boards.
+	Say y here to enable support for the axp221 / axp223 pmic found on most
+	sun6i (A31) / sun8i (A23) boards.
 
 config AXP221_DLDO1_VOLT
 	int "axp221 dldo1 voltage"