[kernels] adding RMSNorm kernel for mps devices (#42058)

add kernel

Author: MekkCyber

src/transformers/integrations/hub_kernels.py

@@ -111,6 +111,12 @@ def use_kernel_func_from_hub(func_name: str):
                     layer_name="RMSNorm",
                 )
             },
+            "mps": {
+                Mode.INFERENCE: LayerRepository(
+                    repo_id="kernels-community/mlx_rmsnorm",
+                    layer_name="RMSNorm",
+                )
+            },
             "npu": {
                 Mode.INFERENCE: LayerRepository(
                     repo_id="kernels-community/liger_kernels",