Fix device_map check for ggml files (#37003)

fix

src/transformers/modeling_utils.py

@@ -4329,7 +4329,11 @@ class PreTrainedModel(nn.Module, ModuleUtilsMixin, GenerationMixin, PushToHubMix
                 "You cannot combine Quantization and loading a model from a GGUF file, try again by making sure you did not passed a `quantization_config` or that you did not load a quantized model from the Hub."
             )
 
-        if gguf_file and device_map is not None and "disk" in device_map.values():
+        if (
+            gguf_file
+            and device_map is not None
+            and ((isinstance(device_map, dict) and "disk" in device_map.values()) or "disk" in device_map)
+        ):
             raise RuntimeError(
                 "One or more modules is configured to be mapped to disk. Disk offload is not supported for models "
                 "loaded from GGUF files."