nil: Match on gob types in the tiled image copy code

This depends on GOB types but we really only support Turing for now.
Add the match statement anyway so we panic if we see an unsupported GOB
type instead of pretending it's TuringColor2D and copying anyway.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35660>

src/nouveau/nil/copy.rs

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: MIT
 
 use crate::extent::{units, Extent4D, Offset4D};
-use crate::tiling::Tiling;
+use crate::tiling::{GOBType, Tiling};
 
 use std::ffi::c_void;
 use std::ops::Range;
@@ -551,14 +551,19 @@ pub unsafe extern "C" fn nil_copy_linear_to_tiled(
         linear_plane_stride_B,
     );
 
-    copy_tiled::<CopyGOBTuring2D<RawCopyToTiled>>(
-        *tiling,
-        level_extent_B,
-        tiled_dst,
-        linear_pointer,
-        offset_B,
-        end_B,
-    );
+    match tiling.gob_type {
+        GOBType::TuringColor2D => {
+            copy_tiled::<CopyGOBTuring2D<RawCopyToTiled>>(
+                *tiling,
+                level_extent_B,
+                tiled_dst,
+                linear_pointer,
+                offset_B,
+                end_B,
+            );
+        }
+        _ => panic!("Unsupported GOB type"),
+    }
 }
 
 #[no_mangle]
@@ -583,12 +588,17 @@ pub unsafe extern "C" fn nil_copy_tiled_to_linear(
         linear_plane_stride_B,
     );
 
-    copy_tiled::<CopyGOBTuring2D<RawCopyToLinear>>(
-        *tiling,
-        level_extent_B,
-        tiled_src,
-        linear_pointer,
-        offset_B,
-        end_B,
-    );
+    match tiling.gob_type {
+        GOBType::TuringColor2D => {
+            copy_tiled::<CopyGOBTuring2D<RawCopyToLinear>>(
+                *tiling,
+                level_extent_B,
+                tiled_src,
+                linear_pointer,
+                offset_B,
+                end_B,
+            );
+        }
+        _ => panic!("Unsupported GOB type"),
+    }
 }