radv: Fix opaque metadata descriptor last layer.

We used the layer count which results in an off by one error.

Not sure this really affects anything.

Fixes: f4e499ec79 "radv: add initial non-conformant radv vulkan driver"
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_image.c

@@ -691,7 +691,7 @@ radv_query_opaque_metadata(struct radv_device *device,
 	si_make_texture_descriptor(device, image, false,
 				   (VkImageViewType)image->type, image->vk_format,
 				   &fixedmapping, 0, image->info.levels - 1, 0,
-				   image->info.array_size,
+				   image->info.array_size - 1,
 				   image->info.width, image->info.height,
 				   image->info.depth,
 				   desc, NULL);