[TASK] Modify Makefile and makefile.settings for ap_PDI

- included indentations
- adapted BSP and hw platform path in makefile.settings
[TASK] Update source to doxygen format

- adapted doxygen format for function headers
- modified apPdi.doxyfile to integrate target files for zynq
[TASK] Clean up systemcomponents library

- moved defines to header file
- reordered functions for clarity
- checked and verified doxygen generated document
[TASK] Adapt makefile.settings for zynq

- re-added lx150t settings
- adapted BSP path as per other settings
[TASK] Fix line endings

- Removed extra spaces between lines
[TASK] Adapt makefile.settings on PCP side

- modified BSP and HW path based on other platforms
[TASK] Remove target specific code from generic part

- moved zynq specific BSP calls to systemComponents
- adapted makefile to differentiate for zynq
[FIX] Adjust the deference fix

- adjusted the deference issue during LinkPdoReq
- changes done to handle InitPcpReq
[TASK] Edit module description

- Fix the typo in module description
[TASK] Add new target specific application

- removed target specific files from generic part
- add new makefile project for digital-IO init
[TASK] Rename HW path in makefile.settings

- common HW platform name for ap and pcp designs
[TASK] Revert gitignore file

- reverted local changes
Merge branch 'zynq-port' of https://github.com/dummylink/plnk_fpga_dk into zynq-port