net: ipmr: Remove nowait arg to ipmr_get_route

ipmr_get_route has 1 caller and the nowait arg is 0. Remove the arg and
simplify ipmr_get_route accordingly.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/mroute.h b/include/linux/mroute.h
index e5fb813..f019b62 100644
--- a/include/linux/mroute.h
+++ b/include/linux/mroute.h
@@ -120,5 +120,5 @@ struct mfc_cache {
 struct rtmsg;
 int ipmr_get_route(struct net *net, struct sk_buff *skb,
 		   __be32 saddr, __be32 daddr,
-		   struct rtmsg *rtm, int nowait, u32 portid);
+		   struct rtmsg *rtm, u32 portid);
 #endif