enable marlin fp8 blockwise (#8990)

python/sglang/srt/layers/quantization/fp8_utils.py

@@ -789,3 +789,12 @@ def apply_fp8_linear(
                 bias,
                 input.dtype,
             )
+
+
+def can_auto_enable_marlin_fp8() -> bool:
+    try:
+        major, minor = get_device_capability()
+        sm = major * 10 + minor
+        return 80 <= sm < 89
+    except Exception:
+        return False