SUNRPC: Remove the redundant XPRT_CONNECTION_CLOSE flag

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --cc include/linux/sunrpc/xprt.h
Simple merge

diff --cc net/sunrpc/xprt.c
Simple merge

diff --cc net/sunrpc/xprtsock.c
Simple merge