Access partial_rotary_factor from rope_parameters (#29966)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

vllm/model_executor/models/glm4_moe.py

@@ -282,13 +282,12 @@ class Glm4MoeAttention(nn.Module):
             prefix=f"{prefix}.o_proj",
         )
 
-        partial_rotary_factor = getattr(config, "partial_rotary_factor", 0.5)
+        config.rope_parameters.setdefault("partial_rotary_factor", 0.5)
         self.rotary_emb = get_rope(
             self.head_dim,
             rotary_dim=self.head_dim,
             max_position=max_position_embeddings,
             rope_parameters=config.rope_parameters,
-            partial_rotary_factor=partial_rotary_factor,
         )
         self.attn = Attention(
             self.num_heads,