Add support to the Armadeus Systems APF6 Solo / Dual / Quad SoM and
the Armadeus Systems APF6Dev carrier board.

For more details see:
http://www.armadeus.com/english/products-processor_boards-apf6.html
http://www.armadeus.com/english/products-development_boards-apf6_dev.htmlSigned-off-by: NSébastien Szymanski <sebastien.szymanski@armadeus.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>