feat(zynqmp): add hooks for custom runtime setup

Add runtime setup hooks (via custom_runtime_setup()) for low level
operations related to setting up the system to correct state.

Change-Id: I4af7050dba2ee2446366d482bef5f5c5dde4bddf
Signed-off-by: Amit Nagal <amit.nagal@amd.com>
Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
3 files changed