openvswitch: Remove conntrack Kconfig option.

There's no particular desire to have conntrack action support in Open
vSwitch as an independently configurable bit, rather just to ensure
there is not a hard dependency. This exposed option doesn't accurately
reflect the conntrack dependency when enabled, so simplify this by
removing the option. Compile the support if NF_CONNTRACK is enabled.

Fixes: 7f8a436eaa2c ("openvswitch: Add conntrack action")
Signed-off-by: Joe Stringer <[e-mail]>
Acked-by: Pravin B Shelar <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/openvswitch/Kconfig

···
 config OPENVSWITCH
 	tristate "Open vSwitch"
 	depends on INET
+	depends on (!NF_CONNTRACK || NF_CONNTRACK)
 	select LIBCRC32C
 	select MPLS
 	select NET_MPLS_GSO
···
 	  called openvswitch.
 
 	  If unsure, say N.
-
-config OPENVSWITCH_CONNTRACK
-	bool "Open vSwitch conntrack action support"
-	depends on OPENVSWITCH
-	depends on NF_CONNTRACK
-	default OPENVSWITCH
-	---help---
-	  If you say Y here, then Open vSwitch module will be able to pass
-	  packets through conntrack.
-
-	  Say N to exclude this support and reduce the binary size.
 
 config OPENVSWITCH_GRE
 	tristate "Open vSwitch GRE tunneling support"

net/openvswitch/Makefile

···
 	vport-internal_dev.o \
 	vport-netdev.o
 
-openvswitch-$(CONFIG_OPENVSWITCH_CONNTRACK) += conntrack.o
+ifneq ($(CONFIG_NF_CONNTRACK),)
+openvswitch-y += conntrack.o
+endif
 
 obj-$(CONFIG_OPENVSWITCH_VXLAN)+= vport-vxlan.o
 obj-$(CONFIG_OPENVSWITCH_GENEVE)+= vport-geneve.o

net/openvswitch/conntrack.h

···
 struct ovs_conntrack_info;
 enum ovs_key_attr;
 
-#if defined(CONFIG_OPENVSWITCH_CONNTRACK)
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
 void ovs_ct_init(struct net *);
 void ovs_ct_exit(struct net *);
 bool ovs_ct_verify(struct net *, enum ovs_key_attr attr);
···
 }
 
 static inline void ovs_ct_free_action(const struct nlattr *a) { }
-#endif
+#endif /* CONFIG_NF_CONNTRACK */
 #endif /* ovs_conntrack.h */