ARM: dts: OMAP5: Add Palmas MFD node and regulator nodes

Add Palmas MFD node and the regulator nodes for OMAP5.

The node definitions are based on: https://lkml.org/lkml/2013/6/6/25



Boot tested on omap5-uevm board.

Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: J Keerthy <j-keerthy@ti.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>