net: ipv6: use ipv6-y directly instead of ipv6-objs

Kbuild supports <modname>-y as well as <modname>-objs.
This simplifies the Makefile.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/Makefile

@@ -5,14 +5,14 @@
 
 obj-$(CONFIG_IPV6) += ipv6.o
 
-ipv6-objs :=	af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
+ipv6-y :=	af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
 		addrlabel.o \
 		route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o udplite.o \
 		raw.o icmp.o mcast.o reassembly.o tcp_ipv6.o ping.o \
 		exthdrs.o datagram.o ip6_flowlabel.o inet6_connection_sock.o \
 		udp_offload.o seg6.o fib6_notifier.o rpl.o ioam6.o
 
-ipv6-$(CONFIG_SYSCTL) = sysctl_net_ipv6.o
+ipv6-$(CONFIG_SYSCTL) += sysctl_net_ipv6.o
 ipv6-$(CONFIG_IPV6_MROUTE) += ip6mr.o
 
 ipv6-$(CONFIG_XFRM) += xfrm6_policy.o xfrm6_state.o xfrm6_input.o \
@@ -27,8 +27,6 @@ ipv6-$(CONFIG_IPV6_SEG6_HMAC) += seg6_hmac.o
 ipv6-$(CONFIG_IPV6_RPL_LWTUNNEL) += rpl_iptunnel.o
 ipv6-$(CONFIG_IPV6_IOAM6_LWTUNNEL) += ioam6_iptunnel.o
 
-ipv6-objs += $(ipv6-y)
-
 obj-$(CONFIG_INET6_AH) += ah6.o
 obj-$(CONFIG_INET6_ESP) += esp6.o
 obj-$(CONFIG_INET6_ESP_OFFLOAD) += esp6_offload.o