register qwen2_vl to rewrite qwen2_vl forwad (#241)

Add qwen2-vl ascend impletation.

---------
Signed-off-by: zouyida <zouyida@huawei.com>

vllm_ascend/__init__.py

@@ -19,3 +19,8 @@
 def register():
     """Register the NPU platform."""
     return "vllm_ascend.platform.NPUPlatform"
+
+
+def register_model():
+    from .models import register_model
+    register_model()