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>