The PMU firmware is still pointing to pre-built images when I run the petalinux-package command.
To work around this issue, run the petalinux-package command with the --pmufw option as shown below.
It will point to "images/linux/pmufw.elf" instead of pointing to "pre-built/"
petalinux-package --boot --format BIN --fsbl images/linux/zynqmp_fsbl.elf --fpga images/linux/design_1_wrapper.bit --u-boot images/linux/u-boot.elf --pmufw images/linux/pmufw.elf --force