Corrected the requirements for the KERNEL_DEVCIETREE
variable example.
(From yocto-docs rev: 0502910c81f4d669457155ed5f52d5fa775d8d6d)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>