[FEATURE] Add Xilinx Zynq MN design for Z702 board

This Xilinx Zynq MN design uses a Microblaze soft-core for the kernel
and ARM core 0 for the user layer.

- Add XPS project files
- Add SDK support files for PS and Microblaze (PL)

Note: The file in sdk/system.xml overwrites the XPS generated file to
      workaround a Xilinx tool bug (XPS 14.7).

Change-Id: I1c6801573ce7aac275beff4bfef984f73be4cc7b
Signed-off-by: Joerg Zelenka <joerg.zelenka@br-automation.com>
[FEATURE] Add UART redirection module for ZC702 board

- Add board specific Microblaze uart module
- Update stack daemon application cmake build to link to uart module
- Update target-microblaze.c to include uart dummy initialization

Change-Id: I0b6b2783bcb9befbd03ec46f84e967e38ca1af0f
Signed-off-by: Joerg Zelenka <joerg.zelenka@br-automation.com>
[TASK] Add .gitreview in main .gitignore

.gitreview shall not be included in repostiory as it is used only
locally.

Change-Id: Ie233fd1fcd72364c2c38b4b91b064a1d4095d46a
[FIX] Fix wrong microblaze definition in targetsystem.h

Change-Id: Ic4e2669ce8fd8cd68e4d175a60e981a0693abece