tu: fix invalid free on alloc failure

this is not an allocated pointer

cc: mesa-stable

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18230>

src/freedreno/vulkan/tu_cs.c

@@ -130,7 +130,6 @@ tu_cs_add_bo(struct tu_cs *cs, uint32_t size)
       tu_bo_init_new(cs->device, &new_bo, size * sizeof(uint32_t),
                      TU_BO_ALLOC_GPU_READ_ONLY | TU_BO_ALLOC_ALLOW_DUMP);
    if (result != VK_SUCCESS) {
-      free(new_bo);
       return result;
    }