when "blank" is not in PACKAGECONFIG, explicitly set dpms and
screensaver off. The intention here is to make it easier to
create builds that should not blank the screen (just remove
"blank" from x11-common PACKAGECONFIG).
Also remove a unneeded "find -exec rm" from do_install.
Partly fixes [YOCTO #7278].
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
