core: udev: remove twofold cache handling

The udev adaption to default poky version left a wrong
cache handling (extract /etc/dev.tar ball) -- removed.

Signed-off-by: Stephan Linz <stephan.linz@clondiag.com>
core: udev: disable cache by default

Signed-off-by: Stephan Linz <stephan.linz@clondiag.com>
tqma35: generate JFFS2 rootfs image

Signed-off-by: Stephan Linz <stephan.linz@clondiag.com>