This is a state which is derived from other states and is actually the first
state which doesn't correspond to any gallium state.
There are two state flags:
bool occlusion_query_enabled
bool flush_depthstencil_enabled
Additional flags can be added later if needed, e.g. bool hiz_enabled.
The emit function will have to figure out the register values by itself.
It basically just emits the registers when the state changes.
This commit also adds a few helper functions for writing registers directly
into a command stream.
Marek Olšák
e2809849ec