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
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig
index b986eda..59fdd30 100644
--- a/configs/xilinx_versal_virt_defconfig
+++ b/configs/xilinx_versal_virt_defconfig
@@ -74,6 +74,7 @@
 CONFIG_DFU_TIMEOUT=y
 CONFIG_DFU_RAM=y
 CONFIG_SYS_DFU_DATA_BUF_SIZE=0x1800000
+CONFIG_ARM_FFA_TRANSPORT=y
 CONFIG_FPGA_XILINX=y
 CONFIG_FPGA_VERSALPL=y
 CONFIG_DM_I2C=y