anv: make get_.*_prog_data take a const pipeline

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
diff --git a/src/intel/vulkan/anv_private.h b/src/intel/vulkan/anv_private.h
index 9e3b72e..954eaf4 100644
--- a/src/intel/vulkan/anv_private.h
+++ b/src/intel/vulkan/anv_private.h
@@ -1465,7 +1465,7 @@
 
 #define ANV_DECL_GET_PROG_DATA_FUNC(prefix, stage)                   \
 static inline const struct brw_##prefix##_prog_data *                \
-get_##prefix##_prog_data(struct anv_pipeline *pipeline)              \
+get_##prefix##_prog_data(const struct anv_pipeline *pipeline)        \
 {                                                                    \
    if (anv_pipeline_has_stage(pipeline, stage)) {                    \
       return (const struct brw_##prefix##_prog_data *)               \