New issue by ILadis on void-packages repository

https://github.com/void-linux/void-packages/issues/26257

Description:
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### System

* xuname:  
  `Void 4.19.127_3 armv7l Unknown notuptodate hold rFFF`
* package:  
  `rpi-kernel-headers-5.4.68_1`

### Expected behavior
Upon running `make scripts` from inside `/usr/src/rpi-kernel-headers-5.*` all kernel scripts should be compiled.

Output of `make scripts`:

```
  HOSTCC  scripts/dtc/flattree.o
  HOSTCC  scripts/dtc/fstree.o
  HOSTCC  scripts/dtc/data.o
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/dtc/treesource.o
  HOSTCC  scripts/dtc/srcpos.o
  HOSTCC  scripts/dtc/checks.o
  HOSTCC  scripts/dtc/util.o
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  HOSTCC  scripts/dtc/dtc-parser.tab.o
  HOSTLD  scripts/dtc/dtc
  HOSTCC  scripts/genksyms/genksyms.o
  HOSTCC  scripts/genksyms/parse.tab.o
  HOSTCC  scripts/genksyms/lex.lex.o
  HOSTLD  scripts/genksyms/genksyms
  HOSTCC  scripts/recordmcount
  HOSTCC  scripts/kallsyms
  HOSTCC  scripts/pnmtologo
  HOSTCC  scripts/conmakehash
  HOSTCC  scripts/sortextable
  HOSTCC  scripts/asn1_compiler
  HOSTCC  scripts/extract-cert
```

### Actual behavior
Some kernel scripts do not get compiled. No errors occur when running `make scripts` but when I try to compile a kernel module/driver from source it complains about a missing kernel script:

```
Building modules, stage 2.
  MODPOST 1 modules
/bin/sh: 1: scripts/mod/modpost: not found
make[2]: *** [scripts/Makefile.modpost:94: __modpost] Error 127
```

If I then try to explicitly run `make` in `/usr/src/rpi-kernel-headers-5.*/scripts/mod` I get the following error:

```
make: *** No rule to make target '/devicetable-offsets.s', needed by '/devicetable-offsets.h'.  Stop.
```

I do not know if that is the only script that can not be compiled. There may be more missing.

### Steps to reproduce the behavior
Run `cd /usr/src/rpi-kernel-headers-5.* && make scripts` and check if `scripts/mod/modpost` gets compiled.

In order to successfully compile the kernel scripts I had to also install the following development tools:  
`make`, `flex`, `gcc`, `libressl-devel`