ARM: exynos_defconfig: Enable Trats2 audio codec, touchscreen and sensors

The Exynos4412-based Trats2 board has Asahi Kasei AK 3-Axis
Magnetometer, CM36651 proximity/ambient light sensor, MMS114 touchscreen
and Wolfson Microelectronics WM1811 CODEC. Enable them in defconfig to
get some testing coverage and use its features.

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