Fix enable_v2 in int8 quant (#11470)

python/sglang/srt/layers/quantization/int8_kernel.py

@@ -15,10 +15,12 @@ if _is_cuda:
     # Temporary
     try:
         from sgl_kernel import sgl_per_token_group_quant_8bit
+
+        enable_sgl_per_token_group_quant_8bit = True
     except ImportError:
-        from sgl_kernel import (
-            sgl_per_token_group_quant_int8 as sgl_per_token_group_quant_8bit,
-        )
+        from sgl_kernel import sgl_per_token_group_quant_int8
+
+        enable_sgl_per_token_group_quant_8bit = False
 
 logger = logging.getLogger(__name__)
 
@@ -211,9 +213,14 @@ def sglang_per_token_group_quant_int8(
         dtype=torch.float32,
     )
 
-    sgl_per_token_group_quant_8bit(
-        x, x_q, x_s, group_size, eps, int8_min, int8_max, enable_v2=enable_v2
-    )
+    # Temporary
+    if enable_sgl_per_token_group_quant_8bit:
+        sgl_per_token_group_quant_8bit(
+            x, x_q, x_s, group_size, eps, int8_min, int8_max, enable_v2=enable_v2
+        )
+    else:
+        assert not enable_v2
+        sgl_per_token_group_quant_int8(x, x_q, x_s, group_size, eps, int8_min, int8_max)
 
     return x_q, x_s