linux-phytec-fsl

mfd: act8945a: Add .of_compatible for act8945a-charger

To regard the act8945a-charger as a sub-device, add .of_compatible for
act8945a-charger cell.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>