netmap_ioctl: use NR_REG_ALL_NIC for internal register requests
netmap_ioctl: use NR_REG_ALL_NIC for internal register requests

This is necessary for those adapters that do not accept any
nr_mode (e.g. pipes).

luigirizzo/netmap,luigirizzo/netmap,luigirizzo/netmap,luigirizzo/netmap,luigirizzo/netmap