net: Remove unnecessary returns from void function()s

This patch removes from net/ (but not any netfilter files)
all the unnecessary return; statements that precede the
last closing brace of void functions.

It does not remove the returns that are immediately
preceded by a label as gcc doesn't like that.

Done via:
$ grep -rP --include=*.[ch] -l "return;\n}" net/ | \
  xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }'

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/route.c

@@ -316,7 +316,6 @@ static void rt6_probe(struct rt6_info *rt)
 #else
 static inline void rt6_probe(struct rt6_info *rt)
 {
-	return;
 }
 #endif
 
@@ -1553,7 +1552,6 @@ void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
 
 out:
 	dst_release(&rt->u.dst);
-	return;
 }
 
 /*