[BUG] [ROCm] [MLA] Fix variable name bug due to change in variable name in PR #17483 (#17961)

Signed-off-by: tjtanaa <tunjian.tan@embeddedllm.com>

vllm/v1/attention/backends/mla/rocm_aiter_mla.py

@@ -98,17 +98,17 @@ class AiterMLAMetadataBuilder(MLACommonMetadataBuilder[AiterMLAMetadata]):
             paged_kv_last_page_len,
         )
 
-    def _build_decode(self, block_table: torch.Tensor,
+    def _build_decode(self, block_table_tensor: torch.Tensor,
                       seq_lens: torch.Tensor) -> AiterMLADecodeMetadata:
 
         (
             paged_kv_indices,
             paged_kv_indptr,
             paged_last_page_len,
-        ) = self._get_paged_kv_tensors(block_table, seq_lens)
+        ) = self._get_paged_kv_tensors(block_table_tensor, seq_lens)
 
         attn_metadata = AiterMLADecodeMetadata(
-            block_table=block_table,
+            block_table=block_table_tensor,
             seq_lens=seq_lens,
             paged_kv_indptr=paged_kv_indptr,
             paged_kv_indices=paged_kv_indices,