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/nir_to_vir.c

@@ -208,6 +208,9 @@ ntq_emit_tmu_general(struct v3d_compile *c, nir_intrinsic_instr *instr,
                         instr->intrinsic == nir_intrinsic_load_scratch ||
                         instr->intrinsic == nir_intrinsic_load_shared);
 
+        if (!is_load)
+                c->tmu_dirty_rcl = true;
+
         bool has_index = !is_shared_or_scratch;
 
         int offset_src;