Pull Request已成功合入, 合并人@CANN-robot
（感谢 renshuojian 的贡献）
变更摘要
该 PR 主要修正了 StatelessDropOutGenMask 算子中 offsetElemCount 的默认值逻辑，同时应用了 clang-format 代码格式化。核心改动是：当可选的 offset 输入不存在时，将 offsetElemCount 从原来错误的 2 改为正确的 0，并在内核侧增加相应的判空保护，避免对不存在的 offset 张量进行 GM 读取。
主要改动
offsetElemCount默认值修正：在stateless_drop_out_gen_mask_tiling_arch35.cpp的getKeyAndCounterlambda 中，将offsetElemCount的默认值从uint32_t offsetElemCount = 2;改为uint32_t offsetElemCount = 0;，使无可选 offset 输入时元数据传递正确。- 内核侧 offset 读取增加判空保护：在
stateless_drop_out_gen_mask_pt.h的Init方法中，对counterGm_的SetGlobalBuffer和后续读取操作增加了if (offsetElemCount > 0)条件判断，当 offset 不可用时跳过 GM 访问，同时counterVal0/counterVal1保持初始值0。 - 代码格式化（clang-format）：对两个文件进行了统一的代码风格调整，包括
=号两侧空格补充（如CORE_ALIGN_SIZE =256→CORE_ALIGN_SIZE = 256）、#include多余空格去除、大括号换行对齐、lambda 参数列表换行、注释对齐、行尾多余空格清理以及文件末尾换行符修复。
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描述
修改offsetElemCount 的默认值为0，因为offset是可选输入，在未提供offset的场景避免访问越界。
关联的Issue
https://gitcode.com/cann/ops-math/issues/2186
测试
david冒烟、obp冒烟
文档更新
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