feat(xilinx): add support to get chipid

Add support for PM API SYS to get the chip ID from the target.
The API calls the IPI command to read the Chip idcode and revision.

Change-Id: Id4d7d812cbf77c5e2fc7785b8afb379214f8dd19
Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
2 files changed