[Compile] Fix Compile Warning SM100 Cutlass MLA (#23287)

Signed-off-by: yewentao256 <zhyanwentao@126.com>

csrc/attention/mla/sm100_cutlass_mla_kernel.cu

@@ -167,7 +167,7 @@ typename T::Fmha::Arguments args_from_options(
       // TODO(trevor-m): Change split_kv back to -1 when
       // https://github.com/NVIDIA/cutlass/issues/2274 is fixed. Split_kv=1 will
       // perform worse with larger context length and smaller batch sizes.
-      num_kv_splits, // split_kv
+      static_cast<int>(num_kv_splits), // split_kv
       nullptr,       // is_var_split_kv
   };
   // TODO(kaixih@nvidia): When split_kv=-1 and is_var_split_kv=false, we compute
@@ -264,7 +264,7 @@ int64_t sm100_cutlass_mla_get_workspace_size(int64_t max_seq_len, int64_t num_ba
   // Assumes device 0 when getting sm_count.
   arguments.hw_info.sm_count =
       sm_count <= 0 ? cutlass::KernelHardwareInfo::query_device_multiprocessor_count(/*device_id=*/0) : sm_count;
-  arguments.split_kv = num_kv_splits;
+  arguments.split_kv = static_cast<int>(num_kv_splits);
   MlaSm100Type::Fmha::set_split_kv(arguments);
 
   return MlaSm100Type::Fmha::get_workspace_size(arguments);