vc4: Fix unused var warnings in release builds from assertions.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6462>
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c
index d2a92518..0d448fa 100644
--- a/src/gallium/drivers/vc4/vc4_program.c
+++ b/src/gallium/drivers/vc4/vc4_program.c
@@ -115,7 +115,7 @@
 static struct qreg
 vc4_ubo_load(struct vc4_compile *c, nir_intrinsic_instr *intr)
 {
-        int buffer_index = nir_src_as_uint(intr->src[0]);
+        ASSERTED int buffer_index = nir_src_as_uint(intr->src[0]);
         assert(buffer_index == 1);
         assert(c->stage == QSTAGE_FRAG);
 
diff --git a/src/gallium/drivers/vc4/vc4_simulator.c b/src/gallium/drivers/vc4/vc4_simulator.c
index 2ce5a75..b3379b1 100644
--- a/src/gallium/drivers/vc4/vc4_simulator.c
+++ b/src/gallium/drivers/vc4/vc4_simulator.c
@@ -421,7 +421,7 @@
         list_for_each_entry_safe(struct drm_vc4_bo, bo, &exec.unref_list,
                                  unref_head) {
                 struct vc4_simulator_bo *sim_bo = (struct vc4_simulator_bo *)bo;
-                struct drm_gem_cma_object *obj = &sim_bo->base.base;
+                ASSERTED struct drm_gem_cma_object *obj = &sim_bo->base.base;
 		list_del(&bo->unref_head);
                 assert(*(uint32_t *)(obj->vaddr + obj->base.size) ==
                        BO_SENTINEL);