accomodate the long-option name change with the update mtd-utils package.
IMAGE_FSTYPES = "jffs2"
UNSLUNG_DEVICE_TABLE = "${@bb.which(bb.data.getVar('BBPATH', d, 1), 'files/device_table-unslung.txt')}"
-EXTRA_IMAGECMD_jffs2 = "--no-eraseblock-headers --pad --big-endian --eraseblock=0x20000 -D ${UNSLUNG_DEVICE_TABLE}"
+EXTRA_IMAGECMD_jffs2 = "-n --pad --big-endian --eraseblock=0x20000 -D ${UNSLUNG_DEVICE_TABLE}"
UNSLUNG_EXTRA_DEPENDS ?= ""
UNSLUNG_EXTRA_RDEPENDS ?= ""