v3d: add new flag dirty TMU cache at v3d_compiler

That we set for any TMU write on spills and general tmu. It is then
used as part of v3d_emit_gl_shader_state later.

v2: add a new flag instead at v3d_compiler instead of dirty the flag
    at v3dx if there is any spill (change suggested by Eric, added by
    Alejandro)

v3: set this for anything that is not a load and do it also in
    v3d40_vir_emit_image_load_store (Eric)

Reviewed-by: Eric Anholt <eric@anholt.net>

src/broadcom/compiler/v3d_compiler.h

@@ -639,6 +639,8 @@ struct v3d_compile {
         bool lock_scoreboard_on_first_thrsw;
 
         bool failed;
+
+        bool tmu_dirty_rcl;
 };
 
 struct v3d_uniform_list {
@@ -658,6 +660,8 @@ struct v3d_prog_data {
          * after-final-THRSW state.
          */
         bool single_seg;
+
+        bool tmu_dirty_rcl;
 };
 
 struct v3d_vs_prog_data {