arm64: zynqmp: Enable FPGA_LOAD_SECURE command

Enable fpga load secure feature for xilinx platforms.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_zynqmp_zc1275_revB_defconfig b/configs/xilinx_zynqmp_zc1275_revB_defconfig
index 179b9e1..e8e32cb 100644
--- a/configs/xilinx_zynqmp_zc1275_revB_defconfig
+++ b/configs/xilinx_zynqmp_zc1275_revB_defconfig
@@ -24,6 +24,7 @@
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_FPGA_LOADBP=y
 CONFIG_CMD_FPGA_LOADP=y
+CONFIG_CMD_FPGA_LOAD_SECURE=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_SF=y
 # CONFIG_CMD_NET is not set