[TASK] Update post build handling for Zynq.

- Modified the post build file for zynq to enable copying of system.bit
[FEATURE] Add SD FAT16 support files for Zynq SoC

- Add source files for SD card library.
- Modify demo application to include support to read CDC
  from SD card.
[TASK] Clean dual processor library code
[TASK] Clean cmake configuration files

- Clean cmake configuration files for stack, hardware, driver daemon
  and application.
- Add bootimage.bif and intermediate makefile for building boot.bin for Zynq.