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Describe the current behavior / 问题描述 (Mandatory / 必填)

tiling中处理padindex为负值的情况导致默认值-1也会参与计算，修改tiling中padindex负数类型支持情况，保持padIndex原始语义

Environment / 环境信息 (Mandatory / 必填)

Ascend950PR

Steps to reproduce the issue / 重现步骤 (Mandatory / 必填)

接口传入padindx为None时必现

Describe the expected behavior / 预期结果 (Mandatory / 必填)

预期padIdx仅支持正数类型，在传入值为None时，aten中的默认值-1不参与计算

Related log / screenshot / 日志 / 截图 (Mandatory / 必填)

torch接口调用默认值时必现

Special notes for this issue/备注 (Optional / 选填)