generic exception false positive

### Description

`arch/mips/kernel/genex.S`

there is a false positive:

```
"matched_text": " * Be careful when changing this, it has to be at most 256 (as a special\n * exception) bytes to fit into space reserved for the exception handler."
```

### How To Reproduce

> Tell us how to reproduce the issue.

### System configuration

> For bug reports, it really helps us to know:

* What OS are you running on? (Windows/MacOS/Linux)
* What version of scancode-toolkit was used to generate the scan file? v31.2.3-377-gcad392f71c
* What installation method was used to install/run scancode? (pip/source download/other)