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_revA_defconfig b/configs/xilinx_zynqmp_zc1275_revA_defconfig
index 75f940e..f76d580 100644
--- a/configs/xilinx_zynqmp_zc1275_revA_defconfig
+++ b/configs/xilinx_zynqmp_zc1275_revA_defconfig
@@ -23,6 +23,7 @@
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_FPGA_LOADBP=y
 CONFIG_CMD_FPGA_LOADP=y
+CONFIG_CMD_FPGA_LOAD_SECURE=y
 CONFIG_CMD_SF=y
 # CONFIG_CMD_NET is not set
 CONFIG_CMD_TIME=y