__dev_remove_pack — remove packet handler
void __dev_remove_pack (struct packet_type * pt);
Remove a protocol handler that was previously added to the kernel
protocol handlers by dev_add_pack. The passed &packet_type is removed
from the kernel lists and can be freed or reused once this function
returns.
The packet type might still be in use by receivers and must not be freed until after all the CPU's have gone through a quiescent state.