i965/blorp: Also skip the fast clear if the clear color differs

If the aux state is CLEAR and clear color value has changed, only the
surface state must be updated. The bit-pattern in the aux buffer is
exactly the same.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/mesa/drivers/dri/i965/brw_blorp.c

@@ -1229,13 +1229,12 @@ do_single_blorp_clear(struct brw_context *brw, struct gl_framebuffer *fb,
          brw_meta_convert_fast_clear_color(brw, irb->mt,
                                            &ctx->Color.ClearColor);
 
-      bool same_clear_color =
-         !intel_miptree_set_clear_color(brw, irb->mt, clear_color);
+      intel_miptree_set_clear_color(brw, irb->mt, clear_color);
 
-      /* If the buffer is already in INTEL_FAST_CLEAR_STATE_CLEAR, the clear
+      /* If the buffer is already in ISL_AUX_STATE_CLEAR, the clear
        * is redundant and can be skipped.
        */
-      if (aux_state == ISL_AUX_STATE_CLEAR && same_clear_color)
+      if (aux_state == ISL_AUX_STATE_CLEAR)
          return;
 
       DBG("%s (fast) to mt %p level %d layers %d+%d\n", __FUNCTION__,