ARM: exynos_defconfig: Enable Maxim 8997 family drivers

Enable support for Maxim 8997 Multi Functional Device present on Trats and
Origen boards by toggling on drivers: charger, haptic motor,
LED, RTC and extcon.

This allows to test and usage of these boards with exynos config.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>