sstate: Add optimizing logic for crosssdk setscene dependencies
This patch mainly aims to add optimisation for crosssdk setscene dependency
validating which we haven't handled in current logic, and which I think we
could have as we've already implemented to native/cross, although there
are albeit not many crossdk tasks, we could still get some performance
enhancement.
Signed-off-by: Ming Liu <ming.liu@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
