[CIFS] Allow update of EOF on remote extend of file

Signed-off-by: Steve French <sfrench@us.ibm.com>

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

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

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

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