ARM: dts: ux500: Push sensors to TVK R2 board

These sensors are particular to the TVK UIB R2 board and
will conflict with the R3 board, so push them down to
the actual UIB include DTSI.

Rename the nodes appropriately to accelerometer@ etc
in the process.

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