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/netlabel/netlabel_addrlist.h

@@ -130,7 +130,6 @@ static inline void netlbl_af4list_audit_addr(struct audit_buffer *audit_buf,
 					     int src, const char *dev,
 					     __be32 addr, __be32 mask)
 {
-	return;
 }
 #endif
 
@@ -203,7 +202,6 @@ static inline void netlbl_af6list_audit_addr(struct audit_buffer *audit_buf,
 					     const struct in6_addr *addr,
 					     const struct in6_addr *mask)
 {
-	return;
 }
 #endif
 #endif /* IPV6 */