[BUGFIX][XPU] fix memory check after XPU reuse GPU_worker (#33358)

Signed-off-by: Chendi Xue <chendi.xue@intel.com>

vllm/v1/worker/gpu_worker.py

@@ -330,7 +330,7 @@ class Worker(WorkerBase):
         free_gpu_memory = profile_result.after_profile.free_memory
         # NOTE(woosuk): Here we assume that the other processes using the same
         # GPU did not change their memory usage during the profiling.
-        assert self.init_snapshot.free_memory > free_gpu_memory, (
+        assert self.init_snapshot.free_memory >= free_gpu_memory, (
             "Error in memory profiling. "
             f"Initial free memory {format_gib(self.init_snapshot.free_memory)} GiB, "
             f"current free memory {format_gib(free_gpu_memory)} GiB. "