If you boot, does the line with the kernel command line still shows this?
Kernel command line: board=Yun console=ttyATH0,250000 mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,14656k(rootfs),1280k(kernel),64k(nvram),64k(art),15936k@0x50000(firmware) rootfstype=squashfs,jffs2 noinitrd
If not, please post the current value of this line (not in the environment but in the boot log).