Add devicetree support for Oxalis SoM board from EBS-SYSTART. This
board is one of the 96Boards Enterprise Edition platform. Below are some
of the key features of this board:

* SoC: NXP Layerscape LS1012A
* RAM: 1GB DDR3L
* PMU: NXP VR5100
* Storage: 64MByte SPI Flash for bootloader and RCW, MicroSD Card, SATA
* Connectivity: 2x Ethernet
* USB: 2x USB3.0

More information about this board can be found in 96Boards product
page: https://www.96boards.org/product/oxalis/

Ethernet and SPI flash are not supported yet!
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>