audit: disable ipsec auditing when CONFIG_AUDITSYSCALL=n

Disables auditing in ipsec when CONFIG_AUDITSYSCALL is
disabled in the kernel.

Also includes a bug fix for xfrm_state.c as a result of
original ipsec audit patch.

Signed-off-by: Joy Latten <latten@austin.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 47c1364..140bb9b 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1986,6 +1986,7 @@
 
 EXPORT_SYMBOL(xfrm_bundle_ok);
 
+#ifdef CONFIG_AUDITSYSCALL
 /* Audit addition and deletion of SAs and ipsec policy */
 
 void xfrm_audit_log(uid_t auid, u32 sid, int type, int result,
@@ -2094,6 +2095,7 @@
 }
 
 EXPORT_SYMBOL(xfrm_audit_log);
+#endif /* CONFIG_AUDITSYSCALL */
 
 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
 {