将rt_mutex_init()由RT_IPC_FLAG_FIFO改为RT_IPC_FLAG_PRIO

[mysterywolf]

Signed-off-by: Meco Man 920369182@qq.com

拉取/合并请求描述：(PR description)

[
边缘化RT_IPC_FLAG_FIFO
]

以下的内容不应该在提交PR时的message修改，修改下述message，PR会被直接关闭。请在提交PR后，浏览器查看PR并对以下检查项逐项check，没问题后逐条在页面上打钩。
The following content must not be changed in the submitted PR message. Otherwise, the PR will be closed immediately. After submitted PR, please use a web browser to visit PR, and check items one by one, and ticked them if no problem.

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
• 本拉取/合并请求代码是高质量的 Code in this PR is of high quality
• 本拉取/合并符合RT-Thread代码规范 This PR complies with RT-Thread code specification

[mysterywolf]

请无视format错误

[BernardXiong]

Please fix this issue: 'Check File Format and License / Scan code format and license (pull_request) '.

[mysterywolf]

这个修复不了，这个不是我的问题引起的，我只是改了一个flag，这个是被改文件其他位置引起的。该CI会扫描整个文件，只要文件一处不符合规定就会报错。CI只是提供一个参考，如果修改无误就可以人工合并了。
此pr只修复特定问题，后续会提交format codes的代码，否则一个pr里夹杂了一堆format codes，不清晰。

[mysterywolf]

#4704

[BernardXiong]

Please check them one by one and carefully. Please not modify BSP.