jffs2: use generic posix ACL infrastructure

Also don't bother to set up a .get_acl method for symlinks as we do not
support access control (ACLs or even mode bits) for symlinks in Linux.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --cc fs/jffs2/acl.c
Simple merge

diff --cc fs/jffs2/acl.h
Simple merge

diff --cc fs/jffs2/dir.c
Simple merge

diff --cc fs/jffs2/file.c
Simple merge

diff --cc fs/jffs2/fs.c
Simple merge

diff --cc fs/jffs2/symlink.c
Simple merge

diff --cc fs/jffs2/xattr.c
Simple merge