[Bugfix] Disable gptq_bitblas for <SM80 to fix GPTQ on V100/T4 (#17541)

Signed-off-by: mgoin <mgoin64@gmail.com>

vllm/model_executor/layers/quantization/gptq_bitblas.py

@@ -134,7 +134,7 @@ class GPTQBitBLASConfig(QuantizationConfig):
 
     @classmethod
     def get_min_capability(cls) -> int:
-        return 70
+        return 80
 
     @classmethod
     def get_config_filenames(cls) -> List[str]: