ARM: dts: sun5i: Add i2c axp152 pmic support for Auxtek T004 boards

Add a node describing the AXP152 pmic used on Auxtek T004 boards.

Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Michael van Slingerland <michael@deviousops.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>