xilinx: Enable FF-A for all our arm64 SoCs

Enable FFA_TRANSPORT which also enable FFA command.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/5a850b1558fad0f05c61de82110abe4c0e7fd2e4.1718104009.git.michal.simek@amd.com