CIFS: Move add/set_credits and get_credits_field to ops structure

Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --cc fs/cifs/cifsglob.h
Simple merge

diff --cc fs/cifs/cifsproto.h
Simple merge

diff --cc fs/cifs/cifssmb.c
Simple merge

diff --cc fs/cifs/connect.c
Simple merge

diff --cc fs/cifs/misc.c
Simple merge

diff --cc fs/cifs/smb1ops.c
Simple merge

diff --cc fs/cifs/transport.c
Simple merge