Do not create symlinks for symlinks
`WCNSS_qcom_wlan_nv.bin` is stored at persist partition on many devices (mostly xiaomis), but there are couple of devices where there are symlinks for `WCNSS_qcom_wlan_nv.bin` on the vendor partition what cause collision.
Latest changes has broken couple of device like xiaomi-daisy because it makes symlinks for symlinks on vendor partion instead of symlinking the file from the persist.
```
qcom-msm89x7:~$ ls -la /lib/firmware/msm-firmware-loader/target/wlan/prima
total 28
drwxr-xr-x 2 root 2000 4096 Dec 31 2008 .
drwxr-xr-x 3 root 2000 4096 Dec 31 2008 ..
lrw-r--r-- 1 root root 34 Dec 31 2008 WCNSS_qcom_cfg.ini -> /data/misc/wifi/WCNSS_qcom_cfg.ini
lrw-r--r-- 1 root root 31 Dec 31 2008 WCNSS_qcom_wlan_nv.bin -> /persist/WCNSS_qcom_wlan_nv.bin
lrw-r--r-- 1 root root 34 Dec 31 2008 WCNSS_wlan_dictionary.dat -> /persist/WCNSS_wlan_dictionary.dat
```
Related Issue: https://gitlab.postmarketos.org/postmarketOS/pmaports/-/issues/3613
issue