ARM: ux500: push down Rohm TS to STUIB

The Rohm touchscreen reset and IRQ lines were registered and
configured at the HREF board level of the design, but it is an
integral part of the UIB (User Interface Board). Fix this by
pushing down the pin control node to the u8500 UIB file.

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