This patch is to add a known issue of make menuconfig
in README file. This is also a common issue for OpenWrt.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Tis patch is to fix up some descriptions in README.
Per-device rootfs had been supported, and a known issue
had been found. These also should be updated accordingly.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>