pan/midgard: Add constant intersection filters

pan/midgard: Add constant intersection filters

In the future, we will want to keep track of which components of
constants of various sizes correspond to which parts of the bundle
constants, like in the old scheduler. For now, let's just stub it out
for a simple rule of one instruction with embedded constants per bundle.
We can eventually do better, of course.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>