feat(zynqmp): build pm code as library

Build Platform Management(PM) code as an Library.
Building PM code as library provides an option to switch to different
firmware interfaces like custom packages.

Change-Id: I872d45edf55ac83a6efb86591d12a0fef7b598cb
Signed-off-by: Amit Nagal <amit.nagal@amd.com>
Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
2 files changed