lib/vsprintf.c: Add IPV4 options %pI4[hnbl] for host, network, big and little endian

This should allow the removal of the #defines and uses
of NIPQUAD and NIPQUAD_FMT

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>