[CIFS] If no Access Control Entries, set mode perm bits to zero

Also clean up ACL code

Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

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

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

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