arm64: zynqmp: Disable bootelf and fdt commands for mini configurations

There is no reason to enable these commands for mini configurations.
It saves some space:
   aarch64: (for 2/2 boards) all -19076.0 bss -1048.0 data -1720.0
rodata -3840.0 text -12468.0
            xilinx_zynqmp_mini_emmc1: all -19076 bss -1048 data -1720
rodata -3840 text -12468
            xilinx_zynqmp_mini_emmc0: all -19076 bss -1048 data -1720
rodata -3840 text -12468

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_zynqmp_mini_emmc0_defconfig b/configs/xilinx_zynqmp_mini_emmc0_defconfig
index 917637d..71c320c 100644
--- a/configs/xilinx_zynqmp_mini_emmc0_defconfig
+++ b/configs/xilinx_zynqmp_mini_emmc0_defconfig
@@ -20,6 +20,8 @@
 # CONFIG_CMD_BOOTD is not set
 # CONFIG_CMD_BOOTM is not set
 # CONFIG_CMD_BOOTI is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_FDT is not set
 # CONFIG_CMD_GO is not set
 # CONFIG_CMD_RUN is not set
 # CONFIG_CMD_IMI is not set