Initrd flash single partition issue

Hi,

There is a bug in initrd_flash individual partition. You will need to add below into tools/kernel_flash/l4t_flash_from_kernel.sh

function do_write_APP
{
                local item="${1}"
                local external="${2}"
                local count="${3}"
                local file_image
                local sha1_file
                local sha1_chksum=
                local APP_partition=
                local device_type=
                local disk=
                local part_name
                local tool=mkfs.ext4
                local location=""
                local name=
                local ext=
 
                device_type=$(echo "$item" | cut -d, -f 2 | sed 's/^ //g' - | cut -d: -f 1)
 
                part_name=$(echo "${item}" | cut -d, -f 2 | sed 's/^ //g' - | cut -d: -f 3)
 
                if [ -n "${target_partname}" ] && [ "${target_partname}" != "${part_name}" ]; then
                                echo "Skip writing ${part_name}"
                                return
                fi