intel/fs: lower ray query intrinsics

v2: Add helper for acceleration->root_node computation (Caio)

v3: Update comment on "done" bit (Caio)
    Remove progress bool value for impl function (Caio)
    Don't use nir_shader_instructions_pass to search the shader (Caio)

v4: Rename variable for if/else block (Caio)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13719>

src/intel/compiler/brw_nir_rt.h

@@ -49,6 +49,9 @@ void brw_nir_lower_combined_intersection_any_hit(nir_shader *intersection,
 /* We require the stack to be 8B aligned at the start of a shader */
 #define BRW_BTD_STACK_ALIGN 8
 
+bool brw_nir_lower_ray_queries(nir_shader *shader,
+                               const struct intel_device_info *devinfo);
+
 void brw_nir_lower_shader_returns(nir_shader *shader);
 
 bool brw_nir_lower_shader_calls(nir_shader *shader);