anv: Use the base vk_buffer struct

This mostly gets us the vk_buffer_range() helper but may be useful in
the future.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16607>

src/intel/vulkan/anv_cmd_buffer.c

@@ -1220,8 +1220,8 @@ void anv_CmdBindTransformFeedbackBuffersEXT(
          xfb[firstBinding + i].buffer = buffer;
          xfb[firstBinding + i].offset = pOffsets[i];
          xfb[firstBinding + i].size =
-            anv_buffer_get_range(buffer, pOffsets[i],
-                                 pSizes ? pSizes[i] : VK_WHOLE_SIZE);
+            vk_buffer_range(&buffer->vk, pOffsets[i],
+                            pSizes ? pSizes[i] : VK_WHOLE_SIZE);
       }
    }
 }