Merge tag 'imx-dt-3.16' into staging-3.16

i.MX device tree changes for 3.16:
 - New board support: imx35-pdk, imx51-digi-connectcore, imx6dl-phytec,
   imx6dl-riotboard, and vf610-colibri.
 - Improve device tree support for imx51-babbage and eukrea-cpuimx51 to
   get the same level support as board files, so that we can kill the
   board files.
 - Quite some updates on imx27-phytec-phycore board support from
   Alexander Shiyan
 - Enable USB, sound and touchscreen on the eukrea imx25/35/51 boards,
   from Denis Carikli
 - Quite a lot of patches from Fabio Estevam, updating Freescale
   imx25-pdk and imx27-pdk board support
 - Correct USB device configuration for imx25/35
 - Fixes i2c4 device node in imx6dl.dtsi regarding to compatible string
   and clock data
 - Enable HDMI, TVE, LVDS display support on a bunch of imx5/6 boards
 - Update PCIe to the new binding and enable PCIe support on
   imx6qdl-sabresd board
 - A couple of imx6q-dmo-edmqmx6 updates from Lucas Stach, adding pfuze
   irq gpio and SPI flash
 - Enable CODA7541 VPU for i.MX53
 - A series of updates on imx6qdl-phytec boards from Philipp Zabel
 - Small cleanups and fixes on board imx28-duckbill - Michael Heimpold
 - Add stdout-path property to i.MX boards
 - Karo TX25 board updates from Sascha Hauer
 - Enable pwm and sdhc devices for board vf610-twr