SUNRPC: Prevent immediate close+reconnect

From: Trond Myklebust <trond.myklebust@hammerspace.com>

commit 3be232f11a3cc9b0ef0795e39fa11bdb8e422a06 upstream.

If we have already set up the socket and are waiting for it to connect,
then don't immediately close and retry.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Meena Shanmugam <meenashanmugam@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>