CyanogenMod/lge-kernel-msm7x27 — comment on commit 1f8f6802bd295c303ff683f617b3983efddea978
File:  line 0
By rmcc:

The libra is an entirely different wireless chipset. It isn't present on the P500.
The only reason LG had it enabled was because it's a lazy way to get the wireless private extensions (WEXT_PRIV) built into the network stack.