Use is_flashinfer_available to replace is_hip for flashinfer check (#1596)

Co-authored-by: Zhang Liangang <liangang.zhang@intel.com>

python/sglang/srt/lora/lora_manager.py

@@ -25,13 +25,11 @@ import torch
 from sglang.srt.lora.lora import LoRAAdapter, get_lora_layer
 from sglang.srt.lora.lora_config import LoRAConfig
 from sglang.srt.model_executor.forward_batch_info import ForwardBatch
-from sglang.srt.utils import is_hip, replace_submodule
+from sglang.srt.utils import is_flashinfer_available, replace_submodule
 
 logger = logging.getLogger(__name__)
 
-
-# ROCm: flashinfer available later
-if not is_hip():
+if is_flashinfer_available():
     from flashinfer import SegmentGEMMWrapper