arm:trats:pmic: Power consumption reduction state for Samsung's TRATS board

When charging battery is necessary, the development board needs to
be turned into low power mode for better efficiency.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>