smb: client: make use of smbdirect_socket.statistics

smb: client: make use of smbdirect_socket.statistics

This will allow us to use common functions soon.

Note this generates the following warnings from
scripts/checkpatch.pl --quiet:

 WARNING: quoted string split across lines
 #59: FILE: fs/smb/client/cifs_debug.c:481:
 +               seq_printf(m, "\nDebug count_get_receive_buffer: %llu "
 +                       "count_put_receive_buffer: %llu count_send_empty: %llu",

 WARNING: quoted string split across lines
 #66: FILE: fs/smb/client/cifs_debug.c:486:
                 seq_printf(m, "\nRead Queue "
 +                       "count_enqueue_reassembly_queue: %llu "

 WARNING: quoted string split across lines
 #67: FILE: fs/smb/client/cifs_debug.c:487:
 +                       "count_enqueue_reassembly_queue: %llu "
 +                       "count_dequeue_reassembly_queue: %llu "

 total: 0 errors, 3 warnings, 83 lines checked
 scripts/checkpatch.pl: FAILED

But I left them in there, because it matches the code
arround it...

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>