enable bf16 atomic add on gfx950

include/ck/utility/amd_buffer_addressing.hpp

@@ -578,7 +578,7 @@ __device__ void amd_global_atomic_add_impl(const typename vector_type<T, N>::typ
                                                       tmp.template AsType<half2_t>()[i]);
         });
     }
-#if defined(__gfx942__)
+#if defined(__gfx942__) || defined(__gfx950__)
     else if constexpr(is_same<T, bhalf_t>::value)
     {
         vector_type<bhalf_t, N> tmp{src_thread_data};