feat(xilinx): add feature check function for TF-A specific APIs

Currently, there is common feature check function for firmware APIs
and TF-A specific APIs. This should be separate from firmware APIs.
So add new TF-A API for feature check of TF-A specific APIs.

Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
Change-Id: I5585d17fb6aa1e98989d935117cca10bdb85133e
4 files changed