Remove extern reference to pf_pabuf which uses a struct which no longer exists. Makes gcc4 kernels compile again.
Remove extern reference to pf_pabuf which uses a struct
which no longer exists. Makes gcc4 kernels compile again.

ok henning@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars