Deny 64 bit FF-A messages in FF-A RPC endpoint

FF-A RPC protocol only allows 32 bit FF-A direct messages thus deny all
64 bit messages in the RPC endpoint.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: I37c95425f80b6e2821b3f6b8649ceba8aa007bce
1 file changed