iris: Update aux state for color fast clears (xe2)

The texturing and rendering preparation functions restrict
fast clear support in some cases to account for limitations
on prior platforms. Instead of updating those checks to avoid
resolves on Xe2, we can bypass them by representing the aux
state of a fast-cleared surface as compressed-no-clear. This
is valid because there is no longer a bit pattern which
references a clear value stored outside of the aux surface.

Suggested by Nanley Chery <nanley.g.chery@intel.com>

Signed-off-by: Jianxun Zhang <jianxun.zhang@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29906>

src/gallium/drivers/iris/iris_clear.c

@@ -370,7 +370,9 @@ fast_clear_color(struct iris_context *ice,
    iris_batch_sync_region_end(batch);
 
    iris_resource_set_aux_state(ice, res, level, box->z,
-                               box->depth, ISL_AUX_STATE_CLEAR);
+                               box->depth, devinfo->ver < 20 ?
+                               ISL_AUX_STATE_CLEAR :
+                               ISL_AUX_STATE_COMPRESSED_NO_CLEAR);
    ice->state.dirty |= IRIS_DIRTY_RENDER_BUFFER;
    ice->state.stage_dirty |= IRIS_ALL_STAGE_DIRTY_BINDINGS;
    return;