some kernel includes kernel-image-image and kernel-devicetree packages.
these patckages are defined in kernel.bbclass
but, when use linux-dummy, these packages are not defined.
so, define them as empty packages for avoiding compile error:
ERROR: Nothing RPROVIDES 'kernel-devicetree'
(From OE-Core rev: 8dbae2dd5ac3de629957ca699f823f5438e80163)
Signed-off-by: Li Wang <li.wang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
