xfrm: Const'ify tmpl and address arguments to ->init_temprop()

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc include/net/xfrm.h
Simple merge

diff --cc net/ipv4/xfrm4_state.c
Simple merge

diff --cc net/ipv6/xfrm6_state.c
Simple merge