bsp: k230: add rtc driver

[Ze-Hou]

拉取/合并请求描述：(PR description)

[

庐山派上测试通过

为什么提交这份PR (why to submit this PR)

为k230平台提供RTC的BSP

你的解决方案是什么 (what is your solution)

添加相关rtc代码

请提供验证的bsp和config (provide the config and bsp)

• BSP:bap/k230/drivers/interdrv/rtc

• .config:

• action:

]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用formatting 等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification
• 如果是新增bsp, 已经添加ci检查到.github/ALL_BSP_COMPILE.json 详细请参考链接BSP自查

[github-actions]

📌 Code Review Assignment

🏷️ Tag: bsp_k230

Reviewers: unicornx

Changed Files (Click to expand)

• bsp/k230/.config
• bsp/k230/board/Kconfig
• bsp/k230/drivers/interdrv/rtc/SConscript
• bsp/k230/drivers/interdrv/rtc/drv_rtc.c
• bsp/k230/drivers/interdrv/rtc/drv_rtc.h
• bsp/k230/drivers/utest/SConscript
• bsp/k230/drivers/utest/test_rtc.c
• bsp/k230/rtconfig.h

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📊 Current Review Status (Last Updated: 2025-09-22 14:42 CST)

• ⌛ unicornx Pending Review

---

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   Comment LGTM/lgtm after confirming approval

3. PR合并前需至少一位维护者确认
   PR must be confirmed by at least one maintainer before merging

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[CLAassistant]

All committers have signed the CLA.

[unicornx]

另外 commit 的 message 缺少签名。具体参考 https://github.com/plctlab/plct-rt-thread/blob/notes/0.notes/20241212-github-tips.md#2-how-to-write-git-commit-message

建议通读一下 https://github.com/plctlab/plct-rt-thread/blob/notes/0.notes/20241212-github-tips.md

[unicornx]

@Rbb666 请review，没问题请 merge，谢谢。