anv: More carefully dirty state in BindDescriptorSets

anv: More carefully dirty state in BindDescriptorSets

Instead of dirtying all graphics or all compute based on binding point,
we're now much more careful.  We first check to see if the actual
descriptor set changed and then only dirty the stages used by that
descriptor set.  For dynamic offsets, we keep a bitfield per-stage of
which offsets are actually used in that stage and we only dirty push
constants and descriptors if that stage has dynamic offsets AND those
offsets actually change.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>