socket: cleanups

Namespace related cleaning

 * make cred_to_ucred static
 * remove unused sock_rmalloc function

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc include/linux/socket.h
Simple merge

diff --cc include/net/sock.h
Simple merge

diff --cc net/core/sock.c
Simple merge