Merge branch 'port-st-frontend' of https://github.com/edmooring/open-amp

 into port-st-frontend

apps: zynq7: check NULL pointer in mmap()

Check if pointer is NULL in mmap() before writing to it.

Signed-off-by: Wendy Liang <wendy.liang@xilinx.com>

virtqueue: name is const in virtqueue_create()

Signed-off-by: Wendy Liang <jliang@xilinx.com>

apps: zynqmp userspace: update dts exmaple

Update the size cells to 2 to line up with the latest Xilinx 2017.3 kernel ZynqMP DTS.

apps: zynqmp: set vdev and vdev IPI

It is required to have vdev IPI, will need to
the set the vdev device and vdev IPI in the application.

Signed-off-by: Wendy Liang <jliang@xilinx.com>

remoteproc: zynq: remove compile warning

Signed-off-by: Sam Sortais <sam.sortais@xilinx.com>

change rpmsg error base

This is to fix the issue that RPMSG and VQUEUE use the same
error base.

Signed-off-by: Wendy Liang <jliang@xilinx.com>

Adding libfdt and zlib sources.