[Bugfix] Fix Qwen25VL packed_modules_mapping (#23604)

Signed-off-by: Jee Jee Li <pandaleefree@gmail.com>
Co-authored-by: Michael Goin <mgoin64@gmail.com>

vllm/model_executor/models/qwen2_5_vl.py

@@ -853,6 +853,7 @@ class Qwen2_5_VLForConditionalGeneration(nn.Module, SupportsMultiModal,
                                          SupportsQuant):
 
     packed_modules_mapping = {
+        "qkv_proj": ["q_proj", "k_proj", "v_proj"],
         "gate_up_proj": ["gate_proj", "up_proj"],
     }