[Bug]: seqlen does not take effect when using a dataloader as input

[wenhuach21]

Problem Description

the seqlen is 10 actually

@pytest.mark.parametrize("act_group_size", [-1, 128])
def test_wfp8afp8_static(self, act_group_size, tiny_opt_model, opt_tokenizer, dataloader):
from auto_round.wrapper import WrapperWALayer

    autoround = AutoRound(
        tiny_opt_model,
        opt_tokenizer,
        group_size=128,
        act_group_size=act_group_size,
        iters=2,
        seqlen=2,
        dataset=dataloader,
        data_type="fp8",
        act_dynamic=False,
        act_data_type="fp8",
    )
    autoround.quantize()

Reproduction Steps

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Environment Information

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Error Logs

Additional Context

No response