smb: client: avoid unnecessary reconnects when refreshing referrals

[ Upstream commit 242d23ef ]

Do not mark tcons for reconnect when current connection matches any of
the targets returned by new referral even when there is no cached
entry.

Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Stable-dep-of: 74ebd021 ("cifs: all initializations for tcon should happen in tcon_info_alloc")
Signed-off-by: Sasha Levin <sashal@kernel.org>