ARM: dts: exynos: Add support for the touch-sensitive buttons on Midas family

ARM: dts: exynos: Add support for the touch-sensitive buttons on Midas family

Add support for the capacitive touch-sensitive buttons of the
following smartphones:
- Samsung Galaxy SIII (I9300)
- Samsung Galaxy SIII 4G (I9305)
- Samsung Galaxy Note II (N7100)
- Samsung Galaxy Note II 4G (N7105)

The keycodes correspond to markings on the phone case.

Signed-off-by: Simon Shields <[email protected]>
[[email protected]: Fixed keycodes, modified commit message]
Signed-off-by: Denis 'GNUtoo' Carikli <[email protected]>
Signed-off-by: Krzysztof Kozlowski <[email protected]>