ARM: ux500: adjust the TC3589x devices to the binding

The TC3589x devices appearing in the ST Ericsson device trees
are adjusted to use the new binding so this is in a good shape,
and we add the keypad on the TVK1281618 UIB so this is working
again.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>