anv: drop add_var_binding from anv_nir_apply_pipeline_layout.c

It has exactly one caller.  Just inline it.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/vulkan/anv_nir_apply_pipeline_layout.c

@@ -52,17 +52,12 @@ add_binding(struct apply_pipeline_layout_state *state,
    BITSET_SET(state->set[set].used, binding);
 }
 
-static void
-add_var_binding(struct apply_pipeline_layout_state *state, nir_variable *var)
-{
-   add_binding(state, var->data.descriptor_set, var->data.binding);
-}
-
 static void
 add_deref_src_binding(struct apply_pipeline_layout_state *state, nir_src src)
 {
    nir_deref_instr *deref = nir_src_as_deref(src);
-   add_var_binding(state, nir_deref_instr_get_variable(deref));
+   nir_variable *var = nir_deref_instr_get_variable(deref);
+   add_binding(state, var->data.descriptor_set, var->data.binding);
 }
 
 static void